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Centaur Omega globular cluster - NGC 5139 Omega Centauri globular cluster - Visible to the naked eye in the southern hemisphere, Centaurus Omega is the most massive globular cluster in the galaxy. About 17,000 light years ago, millions of stars nearly 12 billion years old are concentrated here. 4-hour installation with a telescope 40 cm diameter. NGC 5139 is the largest and most spectacular globular cluster in the entire night sky, and the largest in our galaxy. At 36 arc minutes, Omega Centauri is larger than the full moon in apparent size. It is located about 17,000 light years away from our Sun and at 4th magnitude, is easily visible without a telescope as a “” star”” in the constellation of Centaurus. Total Exposure 4 Hours with a 14.5”” RCOS telescope

Centaur Omega globular cluster - NGC 5139 Omega Centauri globular cluster - Visible to the naked eye in the southern hemisphere, Centaurus Omega is the most massive globular cluster in the galaxy. About 17,000 light years ago, millions of stars nearly 12 billion years old are concentrated here. 4-hour installation with a telescope 40 cm diameter. NGC 5139 is the largest and most spectacular globular cluster in the entire night sky, and the largest in our galaxy. At 36 arc minutes, Omega Centauri is larger than the full moon in apparent size. It is located about 17,000 light years away from our Sun and at 4th magnitude, is easily visible without a telescope as a “” star”” in the constellation of Centaurus. Total Exposure 4 Hours with a 14.5”” RCOS telescope

R. Gendler

PIX4564432

Nebula IC 2177dans la Unicorn - IC 2177 The Seagull nebula - IC 2177, is a large emission nebula located at the edge of the constellations of the Unicorn and the Great Dog. IC 2177, also known as the Eagle or Seagull Nebula, is a large emission nebulosity located on the border between Monoceros and Canis Major, about 7.5 degrees northeast of Sirius. The brightest portion is the “” head”” of the bird, NGC 2327, measuring some 19 x 17 arc minutes, surrounding an 8th magnitude star, and nearly bisected by an interesting dark lane that stretches from the star eastward, and also including some blue reflection nebulosity. Several open clusters are also involved in this area of nebulosity, the most prominent being NGC 2335, located on the northern “” wing”” of the figure of the Seagull nebula

Nebula IC 2177dans la Unicorn - IC 2177 The Seagull nebula - IC 2177, is a large emission nebula located at the edge of the constellations of the Unicorn and the Great Dog. IC 2177, also known as the Eagle or Seagull Nebula, is a large emission nebulosity located on the border between Monoceros and Canis Major, about 7.5 degrees northeast of Sirius. The brightest portion is the “” head”” of the bird, NGC 2327, measuring some 19 x 17 arc minutes, surrounding an 8th magnitude star, and nearly bisected by an interesting dark lane that stretches from the star eastward, and also including some blue reflection nebulosity. Several open clusters are also involved in this area of nebulosity, the most prominent being NGC 2335, located on the northern “” wing”” of the figure of the Seagull nebula

R. Gendler

PIX4622441

Nebula IC 2177dans la Unicorn - IC 2177 The Seagull nebula - IC 2177, is a large emission nebula located at the edge of the constellations of the Unicorn and the Great Dog. IC 2177, also known as the Eagle or Seagull Nebula, is a large emission nebulosity located on the border between Monoceros and Canis Major, about 7.5 degrees northeast of Sirius. The brightest portion is the “” head”” of the bird, NGC 2327, measuring some 19 x 17 arc minutes, surrounding an 8th magnitude star, and nearly bisected by an interesting dark lane that stretches from the star eastward, and also including some blue reflection nebulosity. Several open clusters are also involved in this area of nebulosity, the most prominent being NGC 2335, located on the northern “” wing”” of the figure of the Seagull nebula

Nebula IC 2177dans la Unicorn - IC 2177 The Seagull nebula - IC 2177, is a large emission nebula located at the edge of the constellations of the Unicorn and the Great Dog. IC 2177, also known as the Eagle or Seagull Nebula, is a large emission nebulosity located on the border between Monoceros and Canis Major, about 7.5 degrees northeast of Sirius. The brightest portion is the “” head”” of the bird, NGC 2327, measuring some 19 x 17 arc minutes, surrounding an 8th magnitude star, and nearly bisected by an interesting dark lane that stretches from the star eastward, and also including some blue reflection nebulosity. Several open clusters are also involved in this area of nebulosity, the most prominent being NGC 2335, located on the northern “” wing”” of the figure of the Seagull nebula

PIX4622466

Royal 16 G. VI, f.185v Raid of the Mansur of Cordoba, illustration from the 'Chroniques de France ou de Saint Denis' (vellum)

Royal 16 G. VI, f.185v Raid of the Mansur of Cordoba, illustration from the 'Chroniques de France ou de Saint Denis' (vellum)

French School, (14th century)

BL1066309

Graph representing the brightness and spectral class of stars, 1914

Graph representing the brightness and spectral class of stars, 1914

UIS5079138

'Relations Between the Spectra and Other Characteristics of the Stars', 1914

'Relations Between the Spectra and Other Characteristics of the Stars', 1914

UIS5089163

Centaur Omega globular cluster - The globular cluster Omega Centauri NGC 5139 - Located 17,000 years ago - light from Earth in the southern constellation of Centaur, Omega Centauri contains several million stars and is one of the most ancient objects in our galaxy. NGC 5139 is the largest and most spectacular globular cluster in the entire night sky, and the largest in our galaxy. At 36 arc minutes, Omega Centauri is larger than the full moon in apparent size. It is located about 17,000 light years away from our Sun and at 4th magnitude, is easily visible without a telescope as a “” star”” in the constellation of Centaurus. It contains about 2 million stars, almost twice as many as M13. The stars in globular clusters are generally older, redder and less massive than our Sun

Centaur Omega globular cluster - The globular cluster Omega Centauri NGC 5139 - Located 17,000 years ago - light from Earth in the southern constellation of Centaur, Omega Centauri contains several million stars and is one of the most ancient objects in our galaxy. NGC 5139 is the largest and most spectacular globular cluster in the entire night sky, and the largest in our galaxy. At 36 arc minutes, Omega Centauri is larger than the full moon in apparent size. It is located about 17,000 light years away from our Sun and at 4th magnitude, is easily visible without a telescope as a “” star”” in the constellation of Centaurus. It contains about 2 million stars, almost twice as many as M13. The stars in globular clusters are generally older, redder and less massive than our Sun

Stephane Guisard

PIX4564418

Elephant tube nebula (VDB 142) in Cephee - The Elephant Trunk Nebula (VDB 142) in Cepheus - IC1396, VDB 142. Nebula located about 2700 years - light from Earth. Image obtained with a telescope 61 cm in diameter. The Elephant Trunk Nebula (IC 1396A) in Cepheus is part of the larger IC 1396 complex which spans a large area of the sky measuring 170 by 140 arc - minutes and is one of the brightest emission nebulae with a magnitude of 3.5. The western portion of IC 1396 contains the Elephant Trunk Nebula (IC 1396A) which is characterized with H - II emissions, dark lanes and globules as well as a small reflection nebula. This stellar nursery lies at a distance of 2,720 light - years away. Image taken with a 24 - inch telescope

Elephant tube nebula (VDB 142) in Cephee - The Elephant Trunk Nebula (VDB 142) in Cepheus - IC1396, VDB 142. Nebula located about 2700 years - light from Earth. Image obtained with a telescope 61 cm in diameter. The Elephant Trunk Nebula (IC 1396A) in Cepheus is part of the larger IC 1396 complex which spans a large area of the sky measuring 170 by 140 arc - minutes and is one of the brightest emission nebulae with a magnitude of 3.5. The western portion of IC 1396 contains the Elephant Trunk Nebula (IC 1396A) which is characterized with H - II emissions, dark lanes and globules as well as a small reflection nebula. This stellar nursery lies at a distance of 2,720 light - years away. Image taken with a 24 - inch telescope

Adam Block

PIX4622392

Nebula IC 405, star AE Aurigae in the Coach - Nebula IC 405 and runaway star AE Aurigae - IC 405, is a nebula illuminated by the massive star AE Aurigae. This type O star is a “” fleeing star”, a star ejected from the Orion nebula about 2.5 million years ago and continues its race at a speed of 200 km per second. The Flaming Star Nebula, IC 405, surrounds the variable star AE Aurigae. AE Aurigae is normally a 5.96 magnitude star of spectral class O. The star AE Aurigae itself is very bright, young, blue, and known as a runaway star since it appears to have been ejected from the Orion Nebula region about 2.5 million years ago

Nebula IC 405, star AE Aurigae in the Coach - Nebula IC 405 and runaway star AE Aurigae - IC 405, is a nebula illuminated by the massive star AE Aurigae. This type O star is a “” fleeing star”, a star ejected from the Orion nebula about 2.5 million years ago and continues its race at a speed of 200 km per second. The Flaming Star Nebula, IC 405, surrounds the variable star AE Aurigae. AE Aurigae is normally a 5.96 magnitude star of spectral class O. The star AE Aurigae itself is very bright, young, blue, and known as a runaway star since it appears to have been ejected from the Orion Nebula region about 2.5 million years ago

Adam Block

PIX4621903

VIEW OF SOLAR EARTHQUAKE AS SEEN BY SOLAR OBSERVATORY, 1998-05-29 (photo)

VIEW OF SOLAR EARTHQUAKE AS SEEN BY SOLAR OBSERVATORY, 1998-05-29 (photo)

REU7972084

Remains of the Crab Supernova (M1) in the Taurus - The Crab nebula, wide field - M1, the Crab nebula, is the rest of a supernova that exploded in 1054. It is located about 7000 light years from Earth in the constellation Taurus. At the heart of this nebula is a pulsar, a very dense neutron star resulting from the explosion of a massive supernova star. The bright star at the bottom right is Zeta Tauri. In the year 1054 AD a star in the constellation of Taurus exploded in a spectacular supernova so bright it appeared to dominate the sky except for the Sun and Moon for many days even in daylight. What we see now top left is the supernova remnant: a brilliant nebula, the first in the famous list compiled by Charles Messier. The nebula houses a spinning neutron star called a pulsar. The brilliant blue star bottom right is the 3rd magnitude Zeta Tauri

Remains of the Crab Supernova (M1) in the Taurus - The Crab nebula, wide field - M1, the Crab nebula, is the rest of a supernova that exploded in 1054. It is located about 7000 light years from Earth in the constellation Taurus. At the heart of this nebula is a pulsar, a very dense neutron star resulting from the explosion of a massive supernova star. The bright star at the bottom right is Zeta Tauri. In the year 1054 AD a star in the constellation of Taurus exploded in a spectacular supernova so bright it appeared to dominate the sky except for the Sun and Moon for many days even in daylight. What we see now top left is the supernova remnant: a brilliant nebula, the first in the famous list compiled by Charles Messier. The nebula houses a spinning neutron star called a pulsar. The brilliant blue star bottom right is the 3rd magnitude Zeta Tauri

PIX4583070

Planetary nebula Shapley 1 in the Rule - The planetary nebula Shapley 1 - This planetary nebula is located about 1000 years ago - light. Image obtained from the 3.9m telescope of Siding Spring This is an unusual annular planetary nebula in Norma. The nebula itself appears quite small at a little over an arc minute in diameter, while its central star is a magnitude 14 white dwarf. This object is unusual because those planetaries that are not bipolar are more or less spherical shells of material thrown off by the central star as it undergoes an internal rearrangement. We often see them as thick annuli because we look through a greater thickness at the edge of the shell. However, Shapley 1 seems to be a true torus, a doughnut - shaped ring of material that we happen to see face - on around the central star. Sp - 1 is about 1000 light years distant

Planetary nebula Shapley 1 in the Rule - The planetary nebula Shapley 1 - This planetary nebula is located about 1000 years ago - light. Image obtained from the 3.9m telescope of Siding Spring This is an unusual annular planetary nebula in Norma. The nebula itself appears quite small at a little over an arc minute in diameter, while its central star is a magnitude 14 white dwarf. This object is unusual because those planetaries that are not bipolar are more or less spherical shells of material thrown off by the central star as it undergoes an internal rearrangement. We often see them as thick annuli because we look through a greater thickness at the edge of the shell. However, Shapley 1 seems to be a true torus, a doughnut - shaped ring of material that we happen to see face - on around the central star. Sp - 1 is about 1000 light years distant

PIX4623906

Nebulae of the horse's head and M42 in Orion - Horsead nebula and Orion nebula - Dark Nebula of the horse's head (IC434 - B33). On the right, the large Orion nebula (M42) is a vast region of star formation. This large complex of nebulosity is located about 1,500 light years away in Orion. The Orion complex is a gigantic stellar nursery where stars are forming out of the dust and gas in the region. Young energetic stars excite the gas in the region ionizing it and causing it to glow in the hydrogen - alpha and oxygen III emission lines. The brightest star in the photo at left at magnitude 1.8 is Alnilam, the middle star of the three distinctive stars in the belt of Orion. At the bottom is the Flame, NGC 2024, and the dark nebula B33, the Horsehead Nebula. Top right is a patch of blue reflection nebulosity NGC 1973 - 4 - 5 and the beautiful Orion Nebula, M 42

Nebulae of the horse's head and M42 in Orion - Horsead nebula and Orion nebula - Dark Nebula of the horse's head (IC434 - B33). On the right, the large Orion nebula (M42) is a vast region of star formation. This large complex of nebulosity is located about 1,500 light years away in Orion. The Orion complex is a gigantic stellar nursery where stars are forming out of the dust and gas in the region. Young energetic stars excite the gas in the region ionizing it and causing it to glow in the hydrogen - alpha and oxygen III emission lines. The brightest star in the photo at left at magnitude 1.8 is Alnilam, the middle star of the three distinctive stars in the belt of Orion. At the bottom is the Flame, NGC 2024, and the dark nebula B33, the Horsehead Nebula. Top right is a patch of blue reflection nebulosity NGC 1973 - 4 - 5 and the beautiful Orion Nebula, M 42

Jerry Lodriguss

PIX4618001

Centauri Omega globular cluster - The globular cluster Omega Centauri, NGC 5139 - Visible to the naked eye in the southern hemisphere, Centaurus Omega is the most massive globular cluster in the galaxy. About 17,000 light years ago, millions of stars nearly 12 billion years old are concentrated here. NGC 5139 is the largest and most spectacular globular cluster in the entire night sky, and the largest in our galaxy. At 36 arc minutes, Omega Centauri is larger than the full moon in apparent size. It is located about 17,000 light years away from our Sun and at 4th magnitude, is easily visible without a telescope as a “” star”” in the constellation of Centaurus. It contains about 2 million stars, almost twice as many as M13. The stars in globular clusters are generally older, redder and less massive than our Sun

Centauri Omega globular cluster - The globular cluster Omega Centauri, NGC 5139 - Visible to the naked eye in the southern hemisphere, Centaurus Omega is the most massive globular cluster in the galaxy. About 17,000 light years ago, millions of stars nearly 12 billion years old are concentrated here. NGC 5139 is the largest and most spectacular globular cluster in the entire night sky, and the largest in our galaxy. At 36 arc minutes, Omega Centauri is larger than the full moon in apparent size. It is located about 17,000 light years away from our Sun and at 4th magnitude, is easily visible without a telescope as a “” star”” in the constellation of Centaurus. It contains about 2 million stars, almost twice as many as M13. The stars in globular clusters are generally older, redder and less massive than our Sun

Jerry Lodriguss

PIX4564370

Planetary nebula M57 (NGC 6720) in Lyra - The Ring nebula (M57) in Lyra - The planetary nebula of Lyra (M57) is located about 2000 years - light from Earth. With a magnitude of 9.0, this nebula is easily observed with a small telescope. A planetary nebula is a gas shell from a small late-life star whose heart collapsed to become a white dwarf and expelled the outer layers of its matter. The Ring Nebula, M57, is the most famous example of a planetary nebula. Located about 2,000 light years away, it has an apparent diameter of 1 arc minute and a real diameter of about one light year. At magnitude 9.0 its high surface brightness makes it an easy object, even from the city and even with small telescopes. Despite their name, planetary nebulae have nothing to do with planets. They were named originally because their discoverers observed them visually and they did not appear as stellar point sources, but rather as small diffuse objects that resembled the outer planets in our solar system such

Planetary nebula M57 (NGC 6720) in Lyra - The Ring nebula (M57) in Lyra - The planetary nebula of Lyra (M57) is located about 2000 years - light from Earth. With a magnitude of 9.0, this nebula is easily observed with a small telescope. A planetary nebula is a gas shell from a small late-life star whose heart collapsed to become a white dwarf and expelled the outer layers of its matter. The Ring Nebula, M57, is the most famous example of a planetary nebula. Located about 2,000 light years away, it has an apparent diameter of 1 arc minute and a real diameter of about one light year. At magnitude 9.0 its high surface brightness makes it an easy object, even from the city and even with small telescopes. Despite their name, planetary nebulae have nothing to do with planets. They were named originally because their discoverers observed them visually and they did not appear as stellar point sources, but rather as small diffuse objects that resembled the outer planets in our solar system such

Jerry Lodriguss

PIX4623312

Planetary nebula M57 (NGC 6720) in Lyra - The Ring nebula (M57) in Lyra - The planetary nebula of Lyra (M57) is located about 2000 years - light from Earth. With a magnitude of 9.0, this nebula is easily observed with a small telescope. A planetary nebula is a gas shell from a small late-life star whose heart collapsed to become a white dwarf and expelled the outer layers of its matter. The Ring Nebula, M57, is the most famous example of a planetary nebula. Located about 2,000 light years away, it has an apparent diameter of 1 arc minute and a real diameter of about one light year. At magnitude 9.0 its high surface brightness makes it an easy object, even from the city and even with small telescopes. Despite their name, planetary nebulae have nothing to do with planets. They were named originally because their discoverers observed them visually and they did not appear as stellar point sources, but rather as small diffuse objects that resembled the outer planets in our solar system such

Planetary nebula M57 (NGC 6720) in Lyra - The Ring nebula (M57) in Lyra - The planetary nebula of Lyra (M57) is located about 2000 years - light from Earth. With a magnitude of 9.0, this nebula is easily observed with a small telescope. A planetary nebula is a gas shell from a small late-life star whose heart collapsed to become a white dwarf and expelled the outer layers of its matter. The Ring Nebula, M57, is the most famous example of a planetary nebula. Located about 2,000 light years away, it has an apparent diameter of 1 arc minute and a real diameter of about one light year. At magnitude 9.0 its high surface brightness makes it an easy object, even from the city and even with small telescopes. Despite their name, planetary nebulae have nothing to do with planets. They were named originally because their discoverers observed them visually and they did not appear as stellar point sources, but rather as small diffuse objects that resembled the outer planets in our solar system such

Sebastian Voltmer

PIX4623321

Proxima Star of Centauri - Proxima Centauri - Proxima of Centaur (in the center of the image) is the closest star to the Sun, at a distance of 4.2 years - light. Image obtained from the 1.2m Schmidt UK telescope of Siding Spring. Proxima Centauri is the nearest known star to the sun, at a distance of about 4.2 light years. It is an intrinsically faint red star, more than ten magnitudes (ten thousand times) fainter than the Sun. It is also much cooler, with a surface temperature of about 3100 C. Its visual (apparent) magnitude is eleven, so it is only visible with a good telescope, and only then from southern latitudes. Proxima is about one - tenth the mass of the sun, which accounts for its low surface temperature. It is possibly an outlying member of the triple alpha Centauri system just a few light days closer to us than the other, much brighter stars in the group

Proxima Star of Centauri - Proxima Centauri - Proxima of Centaur (in the center of the image) is the closest star to the Sun, at a distance of 4.2 years - light. Image obtained from the 1.2m Schmidt UK telescope of Siding Spring. Proxima Centauri is the nearest known star to the sun, at a distance of about 4.2 light years. It is an intrinsically faint red star, more than ten magnitudes (ten thousand times) fainter than the Sun. It is also much cooler, with a surface temperature of about 3100 C. Its visual (apparent) magnitude is eleven, so it is only visible with a good telescope, and only then from southern latitudes. Proxima is about one - tenth the mass of the sun, which accounts for its low surface temperature. It is possibly an outlying member of the triple alpha Centauri system just a few light days closer to us than the other, much brighter stars in the group

PIX4571821

Open cluster M35 and NGC 2158 in Gemeaux - Open clusters M35 and NGC 2158 in Gemini - Open cluster M35 (NGC 2168) is visible to the naked eye under good conditions. NGC 2158, lower right, is weaker and is only observed at the telescope. M35 is about 2800 years of light from Earth and is about 110 million years old. M35 (NGC 2168), at left here, is a spectacular large open cluster containing about 200 stars located in Gemini. Shining at magnitude 5, it is visible to the unaided eye off the foot of Gemini. It is accompanied by a jewel - like smaller companion, open cluster NGC 2158, seen at the lower right of the photo. The smaller cluster is easily resolved in the Astro - Physic's 130 EDT refractor, but many people mistake it for a comet when they observe M35 if they have not seen it before and are not familiar with it

Open cluster M35 and NGC 2158 in Gemeaux - Open clusters M35 and NGC 2158 in Gemini - Open cluster M35 (NGC 2168) is visible to the naked eye under good conditions. NGC 2158, lower right, is weaker and is only observed at the telescope. M35 is about 2800 years of light from Earth and is about 110 million years old. M35 (NGC 2168), at left here, is a spectacular large open cluster containing about 200 stars located in Gemini. Shining at magnitude 5, it is visible to the unaided eye off the foot of Gemini. It is accompanied by a jewel - like smaller companion, open cluster NGC 2158, seen at the lower right of the photo. The smaller cluster is easily resolved in the Astro - Physic's 130 EDT refractor, but many people mistake it for a comet when they observe M35 if they have not seen it before and are not familiar with it

Jerry Lodriguss

PIX4567932

Newton's 'Principia' Proposition 38, Theory 29 from Newton's 'Principia MathematicaÕ, 1687

Newton's 'Principia' Proposition 38, Theory 29 from Newton's 'Principia MathematicaÕ, 1687

UIS5087514

Paris 1974 Georges Seguy and Edmond Maire (b/w photo)

Paris 1974 Georges Seguy and Edmond Maire (b/w photo)

Jean-Paul Paireault

JPP7312340

Nebulae of the horse's head and M42 in Orion - Horsead nebula and Orion nebula - Dark Nebula of the horse's head (IC434 - B33). Further down, the large Orion nebula (M42) vast star-forming region. This large complex of nebulosity is located about 1,500 light years away in Orion. The Orion complex is a gigantic stellar nursery where stars are forming out of the dust and gas in the region. Young energetic stars excite the gas in the region ionizing it and causing it to glow in the hydrogen - alpha and oxygen III emission lines. The brightest star in the photo at upper right at magnitude 1.8 is Alnilam, the middle star of the three distinctive stars in the belt of Orion. At the left is the Flame, NGC 2024, and below it is dark nebula B33, the Horsehead Nebula. Below is a patch of blue reflection nebulosity NGC 1973 - 4 - 5 and bottom is the beautiful Orion Nebula, M 42

Nebulae of the horse's head and M42 in Orion - Horsead nebula and Orion nebula - Dark Nebula of the horse's head (IC434 - B33). Further down, the large Orion nebula (M42) vast star-forming region. This large complex of nebulosity is located about 1,500 light years away in Orion. The Orion complex is a gigantic stellar nursery where stars are forming out of the dust and gas in the region. Young energetic stars excite the gas in the region ionizing it and causing it to glow in the hydrogen - alpha and oxygen III emission lines. The brightest star in the photo at upper right at magnitude 1.8 is Alnilam, the middle star of the three distinctive stars in the belt of Orion. At the left is the Flame, NGC 2024, and below it is dark nebula B33, the Horsehead Nebula. Below is a patch of blue reflection nebulosity NGC 1973 - 4 - 5 and bottom is the beautiful Orion Nebula, M 42

Jerry Lodriguss

PIX4617889

Around Baade's window - Around Baade's window - Stars field to the center of our galaxy. The bright star at the bottom of the image is Gamma of Sagittarius. The globular cluster in the center of the image is NGC 6522. Image obtained from the 1.2m Schmidt UK telescope of Siding Spring. The German - American astronomer Walter Baade selected for study a region of the crowded star fields in Sagittarius where he believed the Galactic dust obscuration was both uniform and minimal. He used this line of sight to establish the distance of the unseen Galactic centre, using variable stars as his yardstick. He found it to be about 30,000 light years away. This part of the sky, around the globular cluster NGC 6522, is now known as Baade's window. The brightest star in the photograph is gamma Sagittarii, a deep yellow, naked eye star of about third magnitude. It is in the foreground at a distance of about 100 light years

Around Baade's window - Around Baade's window - Stars field to the center of our galaxy. The bright star at the bottom of the image is Gamma of Sagittarius. The globular cluster in the center of the image is NGC 6522. Image obtained from the 1.2m Schmidt UK telescope of Siding Spring. The German - American astronomer Walter Baade selected for study a region of the crowded star fields in Sagittarius where he believed the Galactic dust obscuration was both uniform and minimal. He used this line of sight to establish the distance of the unseen Galactic centre, using variable stars as his yardstick. He found it to be about 30,000 light years away. This part of the sky, around the globular cluster NGC 6522, is now known as Baade's window. The brightest star in the photograph is gamma Sagittarii, a deep yellow, naked eye star of about third magnitude. It is in the foreground at a distance of about 100 light years

PIX4564878

Nebula near the star S Mon in Unicorn - Fox Fur nebula in Monoceros - Nebula around the bright star S Monocerotis in the constellation Unicorn. S My belongs to a young cluster of stars located about 2600 years from Earth. The region around the 4.7 magnitude star S Mon is a fascinating mixture of red fluorescent hydrogen and dark, obscuring dust lanes. Some dust patches are close enough to bright stars to reflect light from them; these appear blue for the same reason that the day - time sky is blue - because some of the interstellar particles preferentially scatter blue light. The dust is mixed with gas and this affects the appearance of the emission nebulae, giving some of the faintest a curious 'fox fur' texture in this enhanced photograph. S Mon is part of a young open cluster of stars named NGC 2264 located about 2600 light years away, just north of the Cone nebula

Nebula near the star S Mon in Unicorn - Fox Fur nebula in Monoceros - Nebula around the bright star S Monocerotis in the constellation Unicorn. S My belongs to a young cluster of stars located about 2600 years from Earth. The region around the 4.7 magnitude star S Mon is a fascinating mixture of red fluorescent hydrogen and dark, obscuring dust lanes. Some dust patches are close enough to bright stars to reflect light from them; these appear blue for the same reason that the day - time sky is blue - because some of the interstellar particles preferentially scatter blue light. The dust is mixed with gas and this affects the appearance of the emission nebulae, giving some of the faintest a curious 'fox fur' texture in this enhanced photograph. S Mon is part of a young open cluster of stars named NGC 2264 located about 2600 light years away, just north of the Cone nebula

PIX4618692

Nebula NGC 7635 in Cassiopee - Bubble Nebula (NGC 7635) in Cassiopeia - This nebula is located about 7100 years - light from Earth. A massive star, called Wolf - Rayet, is responsible for the formation of this bubble; it is the star BD+60* 2522. The Bubble Nebula in Cassiopeia is one of the most dramatic emission nebulae visible in the northern hemisphere. Lying at a distance of about 7,000 light - years away and spanning six light - years in diameter, NGC 7635 is quite bright with a magnitude of 7.0. The star in the middle of the bubble, BD+602522, is responsible for this stunning site, for this very hot star emits so much UV radiation that it is able to also heat and excite the surrounding dust and gas, thus emitting its own radiation. It is a Wolf - Rayet star, a very luminous star and also very short - lived. This Wolf - Rayet star is 40 times as massive than our sun

Nebula NGC 7635 in Cassiopee - Bubble Nebula (NGC 7635) in Cassiopeia - This nebula is located about 7100 years - light from Earth. A massive star, called Wolf - Rayet, is responsible for the formation of this bubble; it is the star BD+60* 2522. The Bubble Nebula in Cassiopeia is one of the most dramatic emission nebulae visible in the northern hemisphere. Lying at a distance of about 7,000 light - years away and spanning six light - years in diameter, NGC 7635 is quite bright with a magnitude of 7.0. The star in the middle of the bubble, BD+602522, is responsible for this stunning site, for this very hot star emits so much UV radiation that it is able to also heat and excite the surrounding dust and gas, thus emitting its own radiation. It is a Wolf - Rayet star, a very luminous star and also very short - lived. This Wolf - Rayet star is 40 times as massive than our sun

PIX4620681

Celestial Globe Gores, 1636-95 (paper, copper plate, engraving)

Celestial Globe Gores, 1636-95 (paper, copper plate, engraving)

Rossi, Domenico de' (1659-1730)

MMM7340778

Nebula NGC 7635 in Cassiopee - The Bubble Nebula (NGC 7635) in Cassiopeia - This nebula is located about 7100 years - light from Earth. A star 40 times more massive than our Sun, called Wolf - Rayet, is responsible for the formation of this bubble; it is the star BD+60* 2522. The Bubble Nebula in Cassiopeia is one of the most dramatic emission nebulae visible in the northern hemisphere. Lying at a distance of about 7,000 light - years away and spanning six light - years in diameter, NGC 7635 is quite bright with a magnitude of 7.0. The star in the middle of the bubble, BD+602522, is responsible for this stunning site, for this very hot star emits so much UV radiation that it is able to also heat and excite the surrounding dust and gas, thus emitting its own radiation. It is a Wolf - Rayet star, a very luminous star and also very short - lived. This Wolf - Rayet star is 40 times as massive than our sun

Nebula NGC 7635 in Cassiopee - The Bubble Nebula (NGC 7635) in Cassiopeia - This nebula is located about 7100 years - light from Earth. A star 40 times more massive than our Sun, called Wolf - Rayet, is responsible for the formation of this bubble; it is the star BD+60* 2522. The Bubble Nebula in Cassiopeia is one of the most dramatic emission nebulae visible in the northern hemisphere. Lying at a distance of about 7,000 light - years away and spanning six light - years in diameter, NGC 7635 is quite bright with a magnitude of 7.0. The star in the middle of the bubble, BD+602522, is responsible for this stunning site, for this very hot star emits so much UV radiation that it is able to also heat and excite the surrounding dust and gas, thus emitting its own radiation. It is a Wolf - Rayet star, a very luminous star and also very short - lived. This Wolf - Rayet star is 40 times as massive than our sun

Adam Block

PIX4620709

Globular cluster M13 - Hercules cluster - M13 The Great Globular Cluster in Hercules - M13 (NGC 6205), extends for about 150 years - light and is 22,000 years - light from Earth in the constellation of Hercules. It contains hundreds of thousands of stars. Lower left is the galaxy NGC 6207. M13 is the Great Globular Cluster in the constellation of Hercules. It is one of the largest and most beautiful globular clusters visible from the northern hemisphere. At magnitude 5.8, M13 is visible to the keen unaided eye at a dark - sky observing site. It is located about 25,000 light years away. It has an apparent angular diameter of 15 to 25 arc minutes, depending on the size of the telescope used to observe it. This corresponds to a real size of about 145 light years. It contains hundreds of thousands of stars. M13 was discovered in 1714 by Edmond Halley and catalogued by Charles Messier in 1764. Galaxy NGC 6207 can be seen at the lower left. North is to the left in this image

Globular cluster M13 - Hercules cluster - M13 The Great Globular Cluster in Hercules - M13 (NGC 6205), extends for about 150 years - light and is 22,000 years - light from Earth in the constellation of Hercules. It contains hundreds of thousands of stars. Lower left is the galaxy NGC 6207. M13 is the Great Globular Cluster in the constellation of Hercules. It is one of the largest and most beautiful globular clusters visible from the northern hemisphere. At magnitude 5.8, M13 is visible to the keen unaided eye at a dark - sky observing site. It is located about 25,000 light years away. It has an apparent angular diameter of 15 to 25 arc minutes, depending on the size of the telescope used to observe it. This corresponds to a real size of about 145 light years. It contains hundreds of thousands of stars. M13 was discovered in 1714 by Edmond Halley and catalogued by Charles Messier in 1764. Galaxy NGC 6207 can be seen at the lower left. North is to the left in this image

Jerry Lodriguss

PIX4564613

Cephee Constellation - Constellation of Cepheus - At the bottom left, the constellation Cassiopee; at the top, the bright star is the polar star. Cepheus is a representation of King Cepheus of Ethiopia, who has stellar connections, being husband to Cassiopeia and the father of Andromeda. It is a large northern constellation of 588 square degrees, 27th out of 88 in size and is best seen in the early evening in November. It is distinguished by having two unusual stars that are easily seen. Delta Cephei is the prototype for an intrinsically bright class of regularly pulsating variable stars whose period of variability is closely related to their absolute magnitudes. The brightest stars have the longest period, so distance can be estimated by measuring the period and the apparent magnitude of a star. And these stars are bright, so the method can be extended to nearby galaxies. Mu (u) Cephei is an extremely red, irregular variable star easily seen in binoculars. This too is a prototype, of

Cephee Constellation - Constellation of Cepheus - At the bottom left, the constellation Cassiopee; at the top, the bright star is the polar star. Cepheus is a representation of King Cepheus of Ethiopia, who has stellar connections, being husband to Cassiopeia and the father of Andromeda. It is a large northern constellation of 588 square degrees, 27th out of 88 in size and is best seen in the early evening in November. It is distinguished by having two unusual stars that are easily seen. Delta Cephei is the prototype for an intrinsically bright class of regularly pulsating variable stars whose period of variability is closely related to their absolute magnitudes. The brightest stars have the longest period, so distance can be estimated by measuring the period and the apparent magnitude of a star. And these stars are bright, so the method can be extended to nearby galaxies. Mu (u) Cephei is an extremely red, irregular variable star easily seen in binoculars. This too is a prototype, of

PIX4589805

Cephee Constellation - Constellation of Cepheus - At the bottom left, the constellation Cassiopee; at the top, the bright star is the polar star. Cepheus is a representation of King Cepheus of Ethiopia, who has stellar connections, being husband to Cassiopeia and the father of Andromeda. It is a large northern constellation of 588 square degrees, 27th out of 88 in size and is best seen in the early evening in November. It is distinguished by having two unusual stars that are easily seen. Delta Cephei is the prototype for an intrinsically bright class of regularly pulsating variable stars whose period of variability is closely related to their absolute magnitudes. The brightest stars have the longest period, so distance can be estimated by measuring the period and the apparent magnitude of a star. And these stars are bright, so the method can be extended to nearby galaxies. Mu (u) Cephei is an extremely red, irregular variable star easily seen in binoculars. This too is a prototype, of

Cephee Constellation - Constellation of Cepheus - At the bottom left, the constellation Cassiopee; at the top, the bright star is the polar star. Cepheus is a representation of King Cepheus of Ethiopia, who has stellar connections, being husband to Cassiopeia and the father of Andromeda. It is a large northern constellation of 588 square degrees, 27th out of 88 in size and is best seen in the early evening in November. It is distinguished by having two unusual stars that are easily seen. Delta Cephei is the prototype for an intrinsically bright class of regularly pulsating variable stars whose period of variability is closely related to their absolute magnitudes. The brightest stars have the longest period, so distance can be estimated by measuring the period and the apparent magnitude of a star. And these stars are bright, so the method can be extended to nearby galaxies. Mu (u) Cephei is an extremely red, irregular variable star easily seen in binoculars. This too is a prototype, of

PIX4589796

Celestial Globe Gores, 1636-95 (paper, copper plate, engraving)

Celestial Globe Gores, 1636-95 (paper, copper plate, engraving)

Rossi, Domenico de' (1659-1730)

MMM7340779

Spiral galaxy M33 in the Triangle - Spiral galaxy M33 in Triangulum - M33, the galaxy of the Triangle is located about 2 million years from Earth. It belongs to the local group, just like our galaxy or Andromede galaxy. In red, star-forming regions appear. Image obtained from the Isaac Newton telescope of La Palma. M33 is a large, almost face - on spiral galaxy about 2.5 million light years distant in the northern constellation of Triangulum. It is a member of the 'Local Group' of galaxies, which is dominated by the Milky Way and M31. Like M31, M33 is approaching the Milky Way at a velocity of about 180km/s. Although the total light M33 galaxy is that of a star of magnitude 5.3, its large diameter makes it hard to see. However, despite its low surface brightness, this galaxy was among the first to be identified as a 'spiral nebula' by Lord Rosse in the 1840s. On shorter exposures, the nucleus appears very bright and almost stellar, like that in its southern cousin, NGC 300

Spiral galaxy M33 in the Triangle - Spiral galaxy M33 in Triangulum - M33, the galaxy of the Triangle is located about 2 million years from Earth. It belongs to the local group, just like our galaxy or Andromede galaxy. In red, star-forming regions appear. Image obtained from the Isaac Newton telescope of La Palma. M33 is a large, almost face - on spiral galaxy about 2.5 million light years distant in the northern constellation of Triangulum. It is a member of the 'Local Group' of galaxies, which is dominated by the Milky Way and M31. Like M31, M33 is approaching the Milky Way at a velocity of about 180km/s. Although the total light M33 galaxy is that of a star of magnitude 5.3, its large diameter makes it hard to see. However, despite its low surface brightness, this galaxy was among the first to be identified as a 'spiral nebula' by Lord Rosse in the 1840s. On shorter exposures, the nucleus appears very bright and almost stellar, like that in its southern cousin, NGC 300

PIX4609297

Star cluster M46 and M47 and NGC 2438 in the stern - Open clusters M46 and M47 - M46 (NGC 2437), on the left, is a cluster of age stars located at 5400 years - light. It contains about 500 stars, 150 of which are brilliant. It is about 300 million years old. The planetary nebula NGC 2438 does not appear to belong to this cluster, and must be closer although its distance is unknown. On the right, cluster M47 (NGC 2422). Between the two clusters we can see a third one: NGC 2425. M46 and M47 are two open clusters that lie a little more than 1 degree apart in the sky in the constellation of Pupis. M46, containing planetary nebula NGC 2438, is seen at left in this photo, and M47 is at right. M47 is a bright cluster that can be seen with the unaided eye under dark skies. It is comprised of about 30 stars, and is 30 arc minutes in diameter and has an overall brightness of 4.4 magnitude

Star cluster M46 and M47 and NGC 2438 in the stern - Open clusters M46 and M47 - M46 (NGC 2437), on the left, is a cluster of age stars located at 5400 years - light. It contains about 500 stars, 150 of which are brilliant. It is about 300 million years old. The planetary nebula NGC 2438 does not appear to belong to this cluster, and must be closer although its distance is unknown. On the right, cluster M47 (NGC 2422). Between the two clusters we can see a third one: NGC 2425. M46 and M47 are two open clusters that lie a little more than 1 degree apart in the sky in the constellation of Pupis. M46, containing planetary nebula NGC 2438, is seen at left in this photo, and M47 is at right. M47 is a bright cluster that can be seen with the unaided eye under dark skies. It is comprised of about 30 stars, and is 30 arc minutes in diameter and has an overall brightness of 4.4 magnitude

Vincent Toporenko

PIX4568072

Spiral Galaxy M31 in Andromede - The Andromeda Galaxy (M31) - The Andromede galaxy is located about 2.3 million years ago - light from Earth. Two satellite galaxies accompany him: M32 (NGC 221) on the left, and M110 (NGC 205) on the bottom right. Like the lactee path, the Andromede galaxy belongs to the local group, making up about thirty galaxies. Andromeda is the nearest major galaxy to our own Milky Way Galaxy. M31 is about 2.3 million light years far from us in the constellation Andromeda. It is the biggest member in our Local Group. Its diameter is more than 150,000 light years, compared to the Milky Way's 100,000 light years. M31 has two satellite galaxies: M110 (NGC 205) the elliptic galaxy at bottom right respect M31 core and M32 (NGC 221), the bright star - like object at left. The bright blue star at top is the 4.5th magnitude naked Andromedae

Spiral Galaxy M31 in Andromede - The Andromeda Galaxy (M31) - The Andromede galaxy is located about 2.3 million years ago - light from Earth. Two satellite galaxies accompany him: M32 (NGC 221) on the left, and M110 (NGC 205) on the bottom right. Like the lactee path, the Andromede galaxy belongs to the local group, making up about thirty galaxies. Andromeda is the nearest major galaxy to our own Milky Way Galaxy. M31 is about 2.3 million light years far from us in the constellation Andromeda. It is the biggest member in our Local Group. Its diameter is more than 150,000 light years, compared to the Milky Way's 100,000 light years. M31 has two satellite galaxies: M110 (NGC 205) the elliptic galaxy at bottom right respect M31 core and M32 (NGC 221), the bright star - like object at left. The bright blue star at top is the 4.5th magnitude naked Andromedae

PIX4608856

Spiral Galaxy M31 in Andromede - The Andromeda Galaxy (M31) - The Andromede galaxy is located about 2.3 million years ago - light from Earth. Two satellite galaxies accompany him: M32 (NGC 221) on the left, and M110 (NGC 205) on the bottom right. Like the lactee path, the Andromede galaxy belongs to the local group, making up about thirty galaxies. Andromeda is the nearest major galaxy to our own Milky Way Galaxy. M31 is about 2.3 million light years far from us in the constellation Andromeda. It is the biggest member in our Local Group. Its diameter is more than 150,000 light years, compared to the Milky Way's 100,000 light years. M31 has two satellite galaxies: M110 (NGC 205) the elliptic galaxy at bottom right respect M31 core and M32 (NGC 221), the bright star - like object at left. The bright blue star at top is the 4.5th magnitude naked Andromedae

Spiral Galaxy M31 in Andromede - The Andromeda Galaxy (M31) - The Andromede galaxy is located about 2.3 million years ago - light from Earth. Two satellite galaxies accompany him: M32 (NGC 221) on the left, and M110 (NGC 205) on the bottom right. Like the lactee path, the Andromede galaxy belongs to the local group, making up about thirty galaxies. Andromeda is the nearest major galaxy to our own Milky Way Galaxy. M31 is about 2.3 million light years far from us in the constellation Andromeda. It is the biggest member in our Local Group. Its diameter is more than 150,000 light years, compared to the Milky Way's 100,000 light years. M31 has two satellite galaxies: M110 (NGC 205) the elliptic galaxy at bottom right respect M31 core and M32 (NGC 221), the bright star - like object at left. The bright blue star at top is the 4.5th magnitude naked Andromedae

PIX4608859

Nebulae of the horse's head and M42 in Orion - Orion deepfield - Dark Nebula of the horse's head (IC434 - B33). Further down, the large Orion nebula (M42) vast star-forming region. Mosaic of images obtained during more than 20 hours of application, using an H - Alpha filter. This large complex of nebulosity is located about 1,500 light years away in Orion. The Orion complex is a gigantic stellar nursery where stars are forming out of the dust and gas in the region. Young energetic stars excite the gas in the region ionizing it and causing it to glow in the hydrogen - alpha and oxygen III emission lines. The brightest star in the photo at upper right at magnitude 1.8 is Alnilam, the middle star of the three distinctive stars in the belt of Orion. At the left is the Flame, NGC 2024, and below it is dark nebula B33, the Horsehead Nebula. Below is a patch of blue reflection nebulosity NGC 1973 - 4 - 5 and bottom is the beautiful Orion Nebula, M 42. Long - exposure image with an Hydrogen al

Nebulae of the horse's head and M42 in Orion - Orion deepfield - Dark Nebula of the horse's head (IC434 - B33). Further down, the large Orion nebula (M42) vast star-forming region. Mosaic of images obtained during more than 20 hours of application, using an H - Alpha filter. This large complex of nebulosity is located about 1,500 light years away in Orion. The Orion complex is a gigantic stellar nursery where stars are forming out of the dust and gas in the region. Young energetic stars excite the gas in the region ionizing it and causing it to glow in the hydrogen - alpha and oxygen III emission lines. The brightest star in the photo at upper right at magnitude 1.8 is Alnilam, the middle star of the three distinctive stars in the belt of Orion. At the left is the Flame, NGC 2024, and below it is dark nebula B33, the Horsehead Nebula. Below is a patch of blue reflection nebulosity NGC 1973 - 4 - 5 and bottom is the beautiful Orion Nebula, M 42. Long - exposure image with an Hydrogen al

R. Gendler

PIX4617892

Constellation of the Southern Cross - The Southern Cross - The Southern Cross and the Alpha and Beta stars of Centaurus. Crux, the Southern Cross, is the smallest constellation in the sky yet one of the most distinctive, at least to those of us who live in the southern hemisphere. It was once part of Centaurus, where the bright stars Acrux and Mimosa could easly be imagined as the rear hooves of the rearing mythical centaur. However, when Christian sailors began to explore southwards in the 16th century, this memorable asterism took on a new significance. The cross appears on the national flags of several southern hemisphere countries, including Australia, though it can be seen on the southern horizon from the tropic of Cancer, 23.5 degrees north of the equator. Along with the Southern Cross is a very distinctive dark shape known as the Coalsack, much used by southern hemisphere astronomers as an indicator of a dark sky, especially if the sixth magnitude star embedded in it is visible.

Constellation of the Southern Cross - The Southern Cross - The Southern Cross and the Alpha and Beta stars of Centaurus. Crux, the Southern Cross, is the smallest constellation in the sky yet one of the most distinctive, at least to those of us who live in the southern hemisphere. It was once part of Centaurus, where the bright stars Acrux and Mimosa could easly be imagined as the rear hooves of the rearing mythical centaur. However, when Christian sailors began to explore southwards in the 16th century, this memorable asterism took on a new significance. The cross appears on the national flags of several southern hemisphere countries, including Australia, though it can be seen on the southern horizon from the tropic of Cancer, 23.5 degrees north of the equator. Along with the Southern Cross is a very distinctive dark shape known as the Coalsack, much used by southern hemisphere astronomers as an indicator of a dark sky, especially if the sixth magnitude star embedded in it is visible.

PIX4590268

Elephant tube nebula (VDB 142) in Cephee - The Elephant Trunk Nebula (VDB 142) in Cepheus - IC1396, VDB 142. Nebula located about 2700 years - light from Earth. The Elephant Trunk Nebula (IC 1396A) in Cepheus is part of the larger IC 1396 complex which spans a large area of the sky measuring 170 by 140 arc - minutes and is one of the brightest emission nebulae with a magnitude of 3.5. The western portion of IC 1396 contains the Elephant Trunk Nebula (IC 1396A) which is characterized with H - II emissions, dark lanes and globules as well as a small reflection nebula. The IC 1396 complex is technically a star cluster (aka Cr 439, Trumpler 37) owing to the presence of a developing open but loose cluster at the heart of this rich nebulosity. This open star cluster is comprised of 50 - 100 member stars which vary in brightness spanning an area of approximately 50 'in diameter and which are not very well detached from the background sky. This stellar nursery lies at a distance of 2,720 light

Elephant tube nebula (VDB 142) in Cephee - The Elephant Trunk Nebula (VDB 142) in Cepheus - IC1396, VDB 142. Nebula located about 2700 years - light from Earth. The Elephant Trunk Nebula (IC 1396A) in Cepheus is part of the larger IC 1396 complex which spans a large area of the sky measuring 170 by 140 arc - minutes and is one of the brightest emission nebulae with a magnitude of 3.5. The western portion of IC 1396 contains the Elephant Trunk Nebula (IC 1396A) which is characterized with H - II emissions, dark lanes and globules as well as a small reflection nebula. The IC 1396 complex is technically a star cluster (aka Cr 439, Trumpler 37) owing to the presence of a developing open but loose cluster at the heart of this rich nebulosity. This open star cluster is comprised of 50 - 100 member stars which vary in brightness spanning an area of approximately 50 'in diameter and which are not very well detached from the background sky. This stellar nursery lies at a distance of 2,720 light

Sebastian Voltmer

PIX4622327

S star Monocerotis and nebula - Fox Fur nebula in Monoceros - The region to the right of the bright star S Monocerotis is called Fox Fur nebula. This region where gas mixes with interstellar dust is located above the Cone nebula, about 2600 light years from Earth. Image obtained with a 61 cm telescope, composite of several images. The region around the 4.7 magnitude star S Mon is a fascinating mixture of red fluorescent hydrogen and dark, obscuring dust lanes. Some dust patches are close enough to bright stars to reflect light from them; these appear blue for the same reason that the day - time sky is blue - because some of the interstellar particles preferentially scatter blue light. The dust is mixed with gas and this affects the appearance of the emission nebulae, giving some of the faintest a curious 'fox fur' texture in this photograph. S Mon is part of a young open cluster of stars named NGC 2264 located about 2600 light years away, just north of the Cone nebula. Image taken with

S star Monocerotis and nebula - Fox Fur nebula in Monoceros - The region to the right of the bright star S Monocerotis is called Fox Fur nebula. This region where gas mixes with interstellar dust is located above the Cone nebula, about 2600 light years from Earth. Image obtained with a 61 cm telescope, composite of several images. The region around the 4.7 magnitude star S Mon is a fascinating mixture of red fluorescent hydrogen and dark, obscuring dust lanes. Some dust patches are close enough to bright stars to reflect light from them; these appear blue for the same reason that the day - time sky is blue - because some of the interstellar particles preferentially scatter blue light. The dust is mixed with gas and this affects the appearance of the emission nebulae, giving some of the faintest a curious 'fox fur' texture in this photograph. S Mon is part of a young open cluster of stars named NGC 2264 located about 2600 light years away, just north of the Cone nebula. Image taken with

Adam Block

PIX4618724

Corona Australis Dust Complex, 2017 (digital photo)

Corona Australis Dust Complex, 2017 (digital photo)

Cogo, Mario (21st century)

MMM7340922

S star Monocerotis and nebula - Fox Fur nebula in Monoceros - The region to the right of the bright star S Monocerotis is called Fox Fur nebula. This region where gas mixes with interstellar dust is located above the Cone nebula, about 2600 light years from Earth. Image obtained with a 50 cm telescope, composite of several images. The region around the 4.7 magnitude star S Mon is a fascinating mixture of red fluorescent hydrogen and dark, obscuring dust lanes. Some dust patches are close enough to bright stars to reflect light from them; these appear blue for the same reason that the day - time sky is blue - because some of the interstellar particles preferentially scatter blue light. The dust is mixed with gas and this affects the appearance of the emission nebulae, giving some of the faintest a curious 'fox fur' texture in this photograph. S Mon is part of a young open cluster of stars named NGC 2264 located about 2600 light years away, just north of the Cone nebula

S star Monocerotis and nebula - Fox Fur nebula in Monoceros - The region to the right of the bright star S Monocerotis is called Fox Fur nebula. This region where gas mixes with interstellar dust is located above the Cone nebula, about 2600 light years from Earth. Image obtained with a 50 cm telescope, composite of several images. The region around the 4.7 magnitude star S Mon is a fascinating mixture of red fluorescent hydrogen and dark, obscuring dust lanes. Some dust patches are close enough to bright stars to reflect light from them; these appear blue for the same reason that the day - time sky is blue - because some of the interstellar particles preferentially scatter blue light. The dust is mixed with gas and this affects the appearance of the emission nebulae, giving some of the faintest a curious 'fox fur' texture in this photograph. S Mon is part of a young open cluster of stars named NGC 2264 located about 2600 light years away, just north of the Cone nebula

R. Jay GaBany

PIX4618712

Spiral galaxy M33 in the Triangle - Spiral galaxy M33 in Triangulum - M33, (NGC 598), the galaxy of the Triangle, is located about 2 million years ago - light from Earth. It belongs to the local group, just like our galaxy or Andromede galaxy. Image made with an amateur instrument, a 130 mm bezel. The Pinwheel Galaxy, M33, is a very large, beautiful, face - on spiral galaxy. It is more difficult to observe at magnification than its size and magnitude would indicate under skies that are not dark because of it's fairly low surface brightness. Still, under very dark and transparent skies, M33 can be seen with the unaided eye by keen - eyed observers. Several emission nebulae inside of M33 can be seen as pink patches in this photo. The largest and most prominent emission nebula is NGC 604 which is almost 1,500 light - years in diameter. Such clouds are star factories where gas condenses under gravitational attraction and stars are born. It is one of the largest clouds of ionized hydrogen g

Spiral galaxy M33 in the Triangle - Spiral galaxy M33 in Triangulum - M33, (NGC 598), the galaxy of the Triangle, is located about 2 million years ago - light from Earth. It belongs to the local group, just like our galaxy or Andromede galaxy. Image made with an amateur instrument, a 130 mm bezel. The Pinwheel Galaxy, M33, is a very large, beautiful, face - on spiral galaxy. It is more difficult to observe at magnification than its size and magnitude would indicate under skies that are not dark because of it's fairly low surface brightness. Still, under very dark and transparent skies, M33 can be seen with the unaided eye by keen - eyed observers. Several emission nebulae inside of M33 can be seen as pink patches in this photo. The largest and most prominent emission nebula is NGC 604 which is almost 1,500 light - years in diameter. Such clouds are star factories where gas condenses under gravitational attraction and stars are born. It is one of the largest clouds of ionized hydrogen g

Jerry Lodriguss

PIX4609277

Barnard's Loop detail and M78 nebula in Orion - Barnard's Loop detail and M78 nebula in Orion - Barnard's Loop is a very low emission nebula, very large, that surrounds the great Orion nebula. Here, the brightest part of the Loop, with lower left the cluster of stars NGC 2112, and to the right the nebula by refexion M78. Also visible is a dark nebula LDN 1622 at the top left of the image. Barnard's Loop is an extremely faint emission nebula which is part of an amazing, even larger complex of nebulosity in the constellation of Orion. This photo shows only the brightest central portion of the loop which runs diagonally across the frame here from lower left to upper right. NGC 2112, a ninth magnitude open cluster 11 arc minutes in diameter and containing about 50 stars, is seen at lower left - center, and reflection nebulae M78 and NGC 2071 are at lower right. An interesting dark nebula, LDN 1622, lies at the upper left of the image, surrounded by very faint emission nebulosity, with a hi

Barnard's Loop detail and M78 nebula in Orion - Barnard's Loop detail and M78 nebula in Orion - Barnard's Loop is a very low emission nebula, very large, that surrounds the great Orion nebula. Here, the brightest part of the Loop, with lower left the cluster of stars NGC 2112, and to the right the nebula by refexion M78. Also visible is a dark nebula LDN 1622 at the top left of the image. Barnard's Loop is an extremely faint emission nebula which is part of an amazing, even larger complex of nebulosity in the constellation of Orion. This photo shows only the brightest central portion of the loop which runs diagonally across the frame here from lower left to upper right. NGC 2112, a ninth magnitude open cluster 11 arc minutes in diameter and containing about 50 stars, is seen at lower left - center, and reflection nebulae M78 and NGC 2071 are at lower right. An interesting dark nebula, LDN 1622, lies at the upper left of the image, surrounded by very faint emission nebulosity, with a hi

Jerry Lodriguss

PIX4618145

Spiral Galaxy M31 in Andromede - Spiral galaxy M31 in Andromeda - The galaxy of Andromede is located about 2.3 million years ago - light from Earth. Two satellite galaxies accompany him: M32 (NGC 221) on the left, and M110 (NGC 205) on the lower right. Like the lactee path, the Andromede galaxy belongs to the local group, making up about thirty galaxies. Image based on data obtained with the Oschin telescope of Mount Palomar. Andromeda is the nearest major galaxy to our own Milky Way Galaxy. M31 is about 2.3 million light years far from us in the constellation Andromeda. It is the biggest member in our Local Group. Its diameter is more than 150,000 light years, compared to the Milky Way's 100,000 light years. M31 has two satellite galaxies: M110 (NGC 205) the elliptic galaxy at bottom right respect M31 core and M32 (NGC 221), the bright star - like object just below the M31 core. The bright blue star at top is the 4.5th magnitude nu Andromedae. This image is based on data acquired by t

Spiral Galaxy M31 in Andromede - Spiral galaxy M31 in Andromeda - The galaxy of Andromede is located about 2.3 million years ago - light from Earth. Two satellite galaxies accompany him: M32 (NGC 221) on the left, and M110 (NGC 205) on the lower right. Like the lactee path, the Andromede galaxy belongs to the local group, making up about thirty galaxies. Image based on data obtained with the Oschin telescope of Mount Palomar. Andromeda is the nearest major galaxy to our own Milky Way Galaxy. M31 is about 2.3 million light years far from us in the constellation Andromeda. It is the biggest member in our Local Group. Its diameter is more than 150,000 light years, compared to the Milky Way's 100,000 light years. M31 has two satellite galaxies: M110 (NGC 205) the elliptic galaxy at bottom right respect M31 core and M32 (NGC 221), the bright star - like object just below the M31 core. The bright blue star at top is the 4.5th magnitude nu Andromedae. This image is based on data acquired by t

D. De Martin

PIX4608807

Nebula of the cone NGC 2264 in the Unicorn - Nebulae in Monoceros - The nebula of the Cone below, is a region about 2600 years - light from the Earth. The bright star in the high center is S Monocerotis, a star of magnitude 4.7. Nests in these gas clouds, the Christmas tree, a cluster of young stars whose shape evokes a Christmas tree. This wide - field image of the Christmas Tree Cluster was taken at the National Science Foundation's 0.9 - meter telescope on Kitt Peak with the NOAO Mosaic CCD camera. Also known as NGC2264, it is an open cluster of stars embedded in a diffuse nebula. It is located in the constellation of Monoceros, the Unicorn. The image also contains two famous nebula. At the bottom center of the image is the Cone Nebula, and to the upper left is the Fox Fur Nebula. The bright star just above the center of the image is known as S Mon. The gentle arcs in orange and blue near the center of the image are Herbig Haro objects, jets of gas from protostars embedded in the ne

Nebula of the cone NGC 2264 in the Unicorn - Nebulae in Monoceros - The nebula of the Cone below, is a region about 2600 years - light from the Earth. The bright star in the high center is S Monocerotis, a star of magnitude 4.7. Nests in these gas clouds, the Christmas tree, a cluster of young stars whose shape evokes a Christmas tree. This wide - field image of the Christmas Tree Cluster was taken at the National Science Foundation's 0.9 - meter telescope on Kitt Peak with the NOAO Mosaic CCD camera. Also known as NGC2264, it is an open cluster of stars embedded in a diffuse nebula. It is located in the constellation of Monoceros, the Unicorn. The image also contains two famous nebula. At the bottom center of the image is the Cone Nebula, and to the upper left is the Fox Fur Nebula. The bright star just above the center of the image is known as S Mon. The gentle arcs in orange and blue near the center of the image are Herbig Haro objects, jets of gas from protostars embedded in the ne

PIX4618652

Star cluster M46 and planetary nebula NGC 2438 - Open cluster M46 and planetary nebula NGC 2438 - M46 (NGC 2437) is an age cluster located at 5400 years - light. It contains about 500 stars, 150 of which are brilliant. It is about 300 million years old. The planetary nebula NGC 2438 does not appear to belong to this cluster, and must be closer although its distance is unknown. Image obtained by Siding Spring's 3.9m telescope The open cluster NGC 2437 (M46) has an angular diameter of almost half a degree and is quite beautiful in even quite a modest telescope. It has an integrated magnitude of about 6 and so is on the threshold of naked - eye visibility. The cluster is quite old as these things go, about 300 million light years. It is about 5000 light years distant, in the northern part of the constellation of Puppis. Although planetary nebula distances are notoriously difficult to measure, NGC 2438 seems to be in the foreground and is not connected to the cluster. Planetaries are in an

Star cluster M46 and planetary nebula NGC 2438 - Open cluster M46 and planetary nebula NGC 2438 - M46 (NGC 2437) is an age cluster located at 5400 years - light. It contains about 500 stars, 150 of which are brilliant. It is about 300 million years old. The planetary nebula NGC 2438 does not appear to belong to this cluster, and must be closer although its distance is unknown. Image obtained by Siding Spring's 3.9m telescope The open cluster NGC 2437 (M46) has an angular diameter of almost half a degree and is quite beautiful in even quite a modest telescope. It has an integrated magnitude of about 6 and so is on the threshold of naked - eye visibility. The cluster is quite old as these things go, about 300 million light years. It is about 5000 light years distant, in the northern part of the constellation of Puppis. Although planetary nebula distances are notoriously difficult to measure, NGC 2438 seems to be in the foreground and is not connected to the cluster. Planetaries are in an

PIX4568052

Galaxy clusters Abell 1060 in Hydra - The Hydra cluster of galaxies (Abell 1060) - The galaxy in the center is the spiral galaxy NGC 3312. To its right, the brightest elliptical galaxies of this cluster: NGC 3311. The two bright stars are closer and belong to our galaxy. This splendid cluster of galaxies in Hydra is framed by two nearby, cool stars in our own Milky Way. The brightest is about 5th magnitude, visible to the unaided eye only under a dark sky; the second brightest is below naked - eye visibility. In contrast the galaxies appear featureless in all but the largest telescopes. The bluish, elongated galaxy is an edge - on spiral, NGC 3312. It has been distorted by interactions with its neighbours. They in turn have been affected, and the brightest of the two adjacent yellow elliptical galaxies (NGC 3311) has an assymetrical envelope, perhaps as a result of this encounter. It's hard to tell who is jostling who in a crowded group of galaxies such as this. Among the most interest

Galaxy clusters Abell 1060 in Hydra - The Hydra cluster of galaxies (Abell 1060) - The galaxy in the center is the spiral galaxy NGC 3312. To its right, the brightest elliptical galaxies of this cluster: NGC 3311. The two bright stars are closer and belong to our galaxy. This splendid cluster of galaxies in Hydra is framed by two nearby, cool stars in our own Milky Way. The brightest is about 5th magnitude, visible to the unaided eye only under a dark sky; the second brightest is below naked - eye visibility. In contrast the galaxies appear featureless in all but the largest telescopes. The bluish, elongated galaxy is an edge - on spiral, NGC 3312. It has been distorted by interactions with its neighbours. They in turn have been affected, and the brightest of the two adjacent yellow elliptical galaxies (NGC 3311) has an assymetrical envelope, perhaps as a result of this encounter. It's hard to tell who is jostling who in a crowded group of galaxies such as this. Among the most interest

PIX4565253

Galaxy clusters Abell 1060 in Hydra - The Hydra cluster of galaxies (Abell 1060) - The galaxy in the center is the spiral galaxy NGC 3312. To its right, the brightest elliptical galaxies of this cluster: NGC 3311. The two bright stars are closer and belong to our galaxy. This splendid cluster of galaxies in Hydra is framed by two nearby, cool stars in our own Milky Way. The brightest is about 5th magnitude, visible to the unaided eye only under a dark sky; the second brightest is below naked - eye visibility. In contrast the galaxies appear featureless in all but the largest telescopes. The bluish, elongated galaxy is an edge - on spiral, NGC 3312. It has been distorted by interactions with its neighbours. They in turn have been affected, and the brightest of the two adjacent yellow elliptical galaxies (NGC 3311) has an assymetrical envelope, perhaps as a result of this encounter. It's hard to tell who is jostling who in a crowded group of galaxies such as this. Among the most interest

Galaxy clusters Abell 1060 in Hydra - The Hydra cluster of galaxies (Abell 1060) - The galaxy in the center is the spiral galaxy NGC 3312. To its right, the brightest elliptical galaxies of this cluster: NGC 3311. The two bright stars are closer and belong to our galaxy. This splendid cluster of galaxies in Hydra is framed by two nearby, cool stars in our own Milky Way. The brightest is about 5th magnitude, visible to the unaided eye only under a dark sky; the second brightest is below naked - eye visibility. In contrast the galaxies appear featureless in all but the largest telescopes. The bluish, elongated galaxy is an edge - on spiral, NGC 3312. It has been distorted by interactions with its neighbours. They in turn have been affected, and the brightest of the two adjacent yellow elliptical galaxies (NGC 3311) has an assymetrical envelope, perhaps as a result of this encounter. It's hard to tell who is jostling who in a crowded group of galaxies such as this. Among the most interest

PIX4565268

Cone Nebula NGC 2264 in the Unicorn - The Cone Nebula NGC 2264 in Monoceros - The Cone Nebula is a region H II located about 2600 years from Earth. It is accompanied by a cluster of stars called the Christmas tree. The bright star at the top is S Monocerotis, a star of magnitude 4.7. Image obtained with a 50 cm telescope, composite of several images. Total installation of 52 hours. The Cone Nebula (also known as NGC 2264) is an H II region in the constellation of Monoceros. It was discovered by William Herschel in 1785. The nebula is located about 800 parsecs or 2,600 light - years away from Earth. The Cone Nebula is part of the nebulosity surrounding the Christmas Tree Cluster. The designation of NGC 2264 in the New General Catalogue refers to both objects and not the nebula alone. The brightest star on top of the image is S Monocerotis. This image was created by stitching six separate photographs, featuring over 52 total hours of exposure, into a single seamless mosaic. The exposures

Cone Nebula NGC 2264 in the Unicorn - The Cone Nebula NGC 2264 in Monoceros - The Cone Nebula is a region H II located about 2600 years from Earth. It is accompanied by a cluster of stars called the Christmas tree. The bright star at the top is S Monocerotis, a star of magnitude 4.7. Image obtained with a 50 cm telescope, composite of several images. Total installation of 52 hours. The Cone Nebula (also known as NGC 2264) is an H II region in the constellation of Monoceros. It was discovered by William Herschel in 1785. The nebula is located about 800 parsecs or 2,600 light - years away from Earth. The Cone Nebula is part of the nebulosity surrounding the Christmas Tree Cluster. The designation of NGC 2264 in the New General Catalogue refers to both objects and not the nebula alone. The brightest star on top of the image is S Monocerotis. This image was created by stitching six separate photographs, featuring over 52 total hours of exposure, into a single seamless mosaic. The exposures

R. Jay GaBany

PIX4618663

Centaur Omega globular cluster - NGC 5139, Omega Centauri globular cluster - Visible to the naked eye in the southern hemisphere, Centaurus Omega is the most massive globular cluster in the galaxy. About 17,000 light years ago, millions of stars nearly 12 billion years old are concentrated here. This image obtained by the ACS camera of the Hubble space telescope and observations made by the southern Gemini telescope seem to indicate the presence of a black hole in the center of the cluster. NGC 5139 is the largest and most spectacular globular cluster in the entire night sky, and the largest in our galaxy. At 36 arc minutes, Omega Centauri is larger than the full moon in apparent size. It is located about 17,000 light years away from our Sun and at 4th magnitude, is easily visible without a telescope as a “” star”” in the constellation of Centaurus. It contains about 2 million stars, almost twice as many as M13. This composite image obtained with the Advanced Camera for Surveys onboard

Centaur Omega globular cluster - NGC 5139, Omega Centauri globular cluster - Visible to the naked eye in the southern hemisphere, Centaurus Omega is the most massive globular cluster in the galaxy. About 17,000 light years ago, millions of stars nearly 12 billion years old are concentrated here. This image obtained by the ACS camera of the Hubble space telescope and observations made by the southern Gemini telescope seem to indicate the presence of a black hole in the center of the cluster. NGC 5139 is the largest and most spectacular globular cluster in the entire night sky, and the largest in our galaxy. At 36 arc minutes, Omega Centauri is larger than the full moon in apparent size. It is located about 17,000 light years away from our Sun and at 4th magnitude, is easily visible without a telescope as a “” star”” in the constellation of Centaurus. It contains about 2 million stars, almost twice as many as M13. This composite image obtained with the Advanced Camera for Surveys onboard

PIX4564426

NGC 2264, S Monocerotis, Hubble Nebula and Trumpler 5 clusters - NGC 2261, 2264, the Cone nebula and Trumpler 5 - The Cone nebula on the left is a region H II located about 2600 years - light from Earth. The bright star on the top left is S Monocerotis, a star of magnitude 4.7. On the right, an open cluster of stars, Trumpler 5. Downstairs in the center, the Hubble nebula. Image obtained from the 1.2m Schmidt telescope of Siding Spring. The western end of the large constellation of Monoceros crossed by the Galactic plane and so is rich in the ingredients of star formation. Only five degrees south (not shown) is the beautiful Rosette nebula, also close to the Galactic plane. To the east (left) is the outline of the dark Cone nebula with its distinctive bright tip, apparently pointing to the star S Mon at the top (north) of the photograph. All around is faint nebulosity, hinting at star formation in the region. Around the dusty red nebula there are areas where the light from background s

NGC 2264, S Monocerotis, Hubble Nebula and Trumpler 5 clusters - NGC 2261, 2264, the Cone nebula and Trumpler 5 - The Cone nebula on the left is a region H II located about 2600 years - light from Earth. The bright star on the top left is S Monocerotis, a star of magnitude 4.7. On the right, an open cluster of stars, Trumpler 5. Downstairs in the center, the Hubble nebula. Image obtained from the 1.2m Schmidt telescope of Siding Spring. The western end of the large constellation of Monoceros crossed by the Galactic plane and so is rich in the ingredients of star formation. Only five degrees south (not shown) is the beautiful Rosette nebula, also close to the Galactic plane. To the east (left) is the outline of the dark Cone nebula with its distinctive bright tip, apparently pointing to the star S Mon at the top (north) of the photograph. All around is faint nebulosity, hinting at star formation in the region. Around the dusty red nebula there are areas where the light from background s

PIX4618768

The soumbedioune fish market, Dakar, 2022 (photography)

The soumbedioune fish market, Dakar, 2022 (photography)

Sergi Reboredo

SRB7333372

Uranus - Illustration - The planet Uranus and its system of rings. This image suggests how Uranus might look from a position in space several hundred thousand miles above its south pole. Like Saturn and Jupiter, Uranus is a Gas Giant, composed primarily of hydrogen and helium gases surrounding a relatively small, dense core of molten rock and metal. Its bluish color is due to the presence of methane in its upper atmosphere. Also like Saturn and Jupiter, Uranus has rings. However Uranus' rings are over three orders of magnitude dimmer than Saturn's; where Saturn's rings are almost white, Uranus' rings are more like the color of charcoal. Uranus 'rings are so dim that they went undetected from 1781, when the English astronomer William Herschel first observed Uranus through a telescope, until 1977 when astronomers watched as a star passing behind Uranus appeared to blink several times, caused by the ten rings surrounding the planet. One bizarre aspect of Uranus is that its axis of rotatio

Uranus - Illustration - The planet Uranus and its system of rings. This image suggests how Uranus might look from a position in space several hundred thousand miles above its south pole. Like Saturn and Jupiter, Uranus is a Gas Giant, composed primarily of hydrogen and helium gases surrounding a relatively small, dense core of molten rock and metal. Its bluish color is due to the presence of methane in its upper atmosphere. Also like Saturn and Jupiter, Uranus has rings. However Uranus' rings are over three orders of magnitude dimmer than Saturn's; where Saturn's rings are almost white, Uranus' rings are more like the color of charcoal. Uranus 'rings are so dim that they went undetected from 1781, when the English astronomer William Herschel first observed Uranus through a telescope, until 1977 when astronomers watched as a star passing behind Uranus appeared to blink several times, caused by the ten rings surrounding the planet. One bizarre aspect of Uranus is that its axis of rotatio

Walter B Myers

PIX4634800

Elephant tube nebula (VDB 142) in Cephee - The Elephant Trunk Nebula (VDB 142) in Cepheus: IC1396, VDB 142. Nebula located about 2700 light years from Earth. Image obtained with a bezel Tele Vue NP127iS, through 3 different filters that demonstrate oxygen, hydrogen, and sulfur - The Elephant Trunk Nebula (IC 1396A) in Cepheus is part of the larger IC 1396 complex which spans a large area of the sky measuring 170 by 140 arc-minutes and is one of the brightest emission nebulae with a magnitude of 3.5. The western portion of IC 1396 contains the Elephant Trunk Nebula (IC 1396A) which is characterized with H-II emissions, dark lanes and globules as well as a small reflection nebula. The IC 1396 complex is technically a star cluster (aka Cr 439, Trumpler 37) owing to the presence of a developing open but loose cluster at the heart of this rich nebulosity. This open star cluster is comprised of 50-100 member stars which vary in brightness spanning an area of approximately 50 'in diameter and

Elephant tube nebula (VDB 142) in Cephee - The Elephant Trunk Nebula (VDB 142) in Cepheus: IC1396, VDB 142. Nebula located about 2700 light years from Earth. Image obtained with a bezel Tele Vue NP127iS, through 3 different filters that demonstrate oxygen, hydrogen, and sulfur - The Elephant Trunk Nebula (IC 1396A) in Cepheus is part of the larger IC 1396 complex which spans a large area of the sky measuring 170 by 140 arc-minutes and is one of the brightest emission nebulae with a magnitude of 3.5. The western portion of IC 1396 contains the Elephant Trunk Nebula (IC 1396A) which is characterized with H-II emissions, dark lanes and globules as well as a small reflection nebula. The IC 1396 complex is technically a star cluster (aka Cr 439, Trumpler 37) owing to the presence of a developing open but loose cluster at the heart of this rich nebulosity. This open star cluster is comprised of 50-100 member stars which vary in brightness spanning an area of approximately 50 'in diameter and

W. Promper

PIX4622329

Spiral Galaxy M33 in the Triangle - Spiral galaxy M33 in Triangulum - The Galaxy of the Triangle (M33, NGC598) is located about 2 million years ago - light from Earth. It belongs to the local group, just like our galaxy or Andromede galaxy. In red, the star-forming regions appear, especially at the top left NGC 604 one of the largest and most active star-forming regions. It extends over 150 years of light. Image obtained from the Isaac Newton telescope of La Palma. M33 is a large, almost face - on spiral galaxy about 2.5 million light years distant in the northern constellation of Triangulum. It is a member of the 'Local Group' of galaxies, which is dominated by the Milky Way and M31. Like M31, M33 is approaching the Milky Way at a velocity of about 180km/s. Although the total light M33 galaxy is that of a star of magnitude 5.3, its large diameter makes it hard to see. However, despite its low surface brightness, this galaxy was among the first to be identified as a 'spiral nebula' by

Spiral Galaxy M33 in the Triangle - Spiral galaxy M33 in Triangulum - The Galaxy of the Triangle (M33, NGC598) is located about 2 million years ago - light from Earth. It belongs to the local group, just like our galaxy or Andromede galaxy. In red, the star-forming regions appear, especially at the top left NGC 604 one of the largest and most active star-forming regions. It extends over 150 years of light. Image obtained from the Isaac Newton telescope of La Palma. M33 is a large, almost face - on spiral galaxy about 2.5 million light years distant in the northern constellation of Triangulum. It is a member of the 'Local Group' of galaxies, which is dominated by the Milky Way and M31. Like M31, M33 is approaching the Milky Way at a velocity of about 180km/s. Although the total light M33 galaxy is that of a star of magnitude 5.3, its large diameter makes it hard to see. However, despite its low surface brightness, this galaxy was among the first to be identified as a 'spiral nebula' by

PIX4609292

Fishing boats at the soumbedioune fish market, Dakar, 2022 (photography)

Fishing boats at the soumbedioune fish market, Dakar, 2022 (photography)

Sergi Reboredo

SRB7333371

Elephant tube nebula (VDB 142) in Cephee - The Elephant Trunk Nebula (VDB 142) in Cepheus - IC1396, VDB 142. Nebula located about 2700 years - light from Earth. Image obtained with a telescope 40 cm in diameter, through 3 different filters that highlight oxygen, hydrogen, and sulfur. The Elephant Trunk Nebula (IC 1396A) in Cepheus is part of the larger IC 1396 complex which spans a large area of the sky measuring 170 by 140 arc - minutes and is one of the brightest emission nebulae with a magnitude of 3.5. The western portion of IC 1396 contains the Elephant Trunk Nebula (IC 1396A) which is characterized with H - II emissions, dark lanes and globules as well as a small reflection nebula. The IC 1396 complex is technically a star cluster (aka Cr 439, Trumpler 37) owing to the presence of a developing open but loose cluster at the heart of this rich nebulosity. This open star cluster is comprised of 50 - 100 member stars which vary in brightness spanning an area of approximately 50 'in d

Elephant tube nebula (VDB 142) in Cephee - The Elephant Trunk Nebula (VDB 142) in Cepheus - IC1396, VDB 142. Nebula located about 2700 years - light from Earth. Image obtained with a telescope 40 cm in diameter, through 3 different filters that highlight oxygen, hydrogen, and sulfur. The Elephant Trunk Nebula (IC 1396A) in Cepheus is part of the larger IC 1396 complex which spans a large area of the sky measuring 170 by 140 arc - minutes and is one of the brightest emission nebulae with a magnitude of 3.5. The western portion of IC 1396 contains the Elephant Trunk Nebula (IC 1396A) which is characterized with H - II emissions, dark lanes and globules as well as a small reflection nebula. The IC 1396 complex is technically a star cluster (aka Cr 439, Trumpler 37) owing to the presence of a developing open but loose cluster at the heart of this rich nebulosity. This open star cluster is comprised of 50 - 100 member stars which vary in brightness spanning an area of approximately 50 'in d

PIX4622303

Celestial manuscript map, 1863 (cloth, embroidery & pen and ink on paper)

Celestial manuscript map, 1863 (cloth, embroidery & pen and ink on paper)

Rogers, Hattie E. (fl.1863-78)

CH3482905

Open cluster NGC 6939 and galaxy NGC 6946 - Spiral galaxy NGC 6946 and open cluster NGC 6939 - The spiral galaxy NGC 6946 is located about 10 million years ago - light in Cephee. Many star formations are observed here. The cluster of stars NGC 6939, on the right, belongs to our galaxy. Spiral Galaxy NGC 6946 and Open Cluster NGC 6939 are located about 2 degrees southwest of Eta Cepheus. 6946 is a 9.7 magnitude spiral galaxy that was discovered by William Herschel on September 9, 1798 and is about 10 arc minutes in diameter. It is a relatively close galaxy at a distance of about 10 million light years, and was once suspected by Edwin Hubble of being a member of the Local Group of galaxies that includes the Milky Way, but today it is not believed to be a member. Because we are looking at it through the plane of our own galaxy, it is highly obscured by dust. NGC 6946 is sometimes called the Fireworks galaxy because of the number of supernovae that have been discovered there and the galaxy

Open cluster NGC 6939 and galaxy NGC 6946 - Spiral galaxy NGC 6946 and open cluster NGC 6939 - The spiral galaxy NGC 6946 is located about 10 million years ago - light in Cephee. Many star formations are observed here. The cluster of stars NGC 6939, on the right, belongs to our galaxy. Spiral Galaxy NGC 6946 and Open Cluster NGC 6939 are located about 2 degrees southwest of Eta Cepheus. 6946 is a 9.7 magnitude spiral galaxy that was discovered by William Herschel on September 9, 1798 and is about 10 arc minutes in diameter. It is a relatively close galaxy at a distance of about 10 million light years, and was once suspected by Edwin Hubble of being a member of the Local Group of galaxies that includes the Milky Way, but today it is not believed to be a member. Because we are looking at it through the plane of our own galaxy, it is highly obscured by dust. NGC 6946 is sometimes called the Fireworks galaxy because of the number of supernovae that have been discovered there and the galaxy

Jerry Lodriguss

PIX4568549

The cluster of galaxies in Fornax - The cluster of galaxies in Fornax - clusters of galaxies situated about 55 million years ago - light. In the center of the image is the barree spiral galaxy NGC 1365; at the bottom right of the image, the interaction galaxy NGC 1316 - 17 (Fornax A), which is one of the strongest known radiosource. Galaxies can be separated by their appearance into two broad groups, spirals and ellipticals. An example of a spiral galaxy, NGC 1365, is seen in center of this picture. In contrast, most of the galaxies in this cluster are ellipticals, which contain little or no gas or evidence of star formation; indeed they are composed millions of rather old, yellowish stars. Unlike many of the stars in spiral systems, those in ellipticals have orbits which are not confined to a narrow plane, so the galaxy can have a shape anywhere between a perfect sphere and an American football. This kind of galaxy is the most common type in the photograph as it is in all of the nearb

The cluster of galaxies in Fornax - The cluster of galaxies in Fornax - clusters of galaxies situated about 55 million years ago - light. In the center of the image is the barree spiral galaxy NGC 1365; at the bottom right of the image, the interaction galaxy NGC 1316 - 17 (Fornax A), which is one of the strongest known radiosource. Galaxies can be separated by their appearance into two broad groups, spirals and ellipticals. An example of a spiral galaxy, NGC 1365, is seen in center of this picture. In contrast, most of the galaxies in this cluster are ellipticals, which contain little or no gas or evidence of star formation; indeed they are composed millions of rather old, yellowish stars. Unlike many of the stars in spiral systems, those in ellipticals have orbits which are not confined to a narrow plane, so the galaxy can have a shape anywhere between a perfect sphere and an American football. This kind of galaxy is the most common type in the photograph as it is in all of the nearb

PIX4565370

Nebula NGC 3372 in the Carene - NGC 3372 Carina nebula - The Carene Nebula (NGC 3372) is a very large region of star formation visible in the southern hemisphere. Image obtained through 3 different filters that highlight oxygen (blue), hydrogen (green), and sulfur (red). The bright star in the center of the image is Eta Carinae, a super massive star. The Carina Nebula (also known as the Great Nebula in Carina, the Eta Carinae Nebula, or NGC 3372) is a large bright nebula that surrounds several open clusters of stars. Eta Carinae and HD 93129A, two of the most massive and luminous stars in our Milky Way galaxy, are among them. The nebula lies at an estimated distance between 6,500 and 10,000 light years from Earth. It is located in the constellation of Carina. The nebula contains multiple O - type stars. This nebula is one of the largest H II regions in the Milky Way. It has a visual magnitude of 1.0. The nebula is one of the largest diffuse nebulae in our skies. Although it is some fou

Nebula NGC 3372 in the Carene - NGC 3372 Carina nebula - The Carene Nebula (NGC 3372) is a very large region of star formation visible in the southern hemisphere. Image obtained through 3 different filters that highlight oxygen (blue), hydrogen (green), and sulfur (red). The bright star in the center of the image is Eta Carinae, a super massive star. The Carina Nebula (also known as the Great Nebula in Carina, the Eta Carinae Nebula, or NGC 3372) is a large bright nebula that surrounds several open clusters of stars. Eta Carinae and HD 93129A, two of the most massive and luminous stars in our Milky Way galaxy, are among them. The nebula lies at an estimated distance between 6,500 and 10,000 light years from Earth. It is located in the constellation of Carina. The nebula contains multiple O - type stars. This nebula is one of the largest H II regions in the Milky Way. It has a visual magnitude of 1.0. The nebula is one of the largest diffuse nebulae in our skies. Although it is some fou

Tom Davis

PIX4619112

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