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Galaxies Group: Stephan's Quintet in Pegase - Stephan's Quintet group of galaxies - This group of 5 galaxies is located about 260 million years ago - light from Earth. These galaxies interact, however NGC 7320 (upper left) would be 7 times closer to us. Composite image obtained in visible light and infrared by the Hubble space telescope in August 2009. This portrait of Stephan's Quintet, also known as the Hickson Compact Group 92, was taken by the new Wide Field Camera 3 (WFC3) aboard the NASA/ESA Hubble Space Telescope. Stephan's Quintet, as the name implies, is a group of five galaxies. The name, however, is a bit of a misnomer. Studies have shown that group member NGC 7320, at upper left, is actually a foreground galaxy that is about seven times closer to Earth than the rest of the group. Three of the galaxies have distorted shapes, elongated spiral arms, and long, gaseous tidal tails containing myriad star clusters, proof of their close encounters. These interactions have sparked a

Galaxies Group: Stephan's Quintet in Pegase - Stephan's Quintet group of galaxies - This group of 5 galaxies is located about 260 million years ago - light from Earth. These galaxies interact, however NGC 7320 (upper left) would be 7 times closer to us. Composite image obtained in visible light and infrared by the Hubble space telescope in August 2009. This portrait of Stephan's Quintet, also known as the Hickson Compact Group 92, was taken by the new Wide Field Camera 3 (WFC3) aboard the NASA/ESA Hubble Space Telescope. Stephan's Quintet, as the name implies, is a group of five galaxies. The name, however, is a bit of a misnomer. Studies have shown that group member NGC 7320, at upper left, is actually a foreground galaxy that is about seven times closer to Earth than the rest of the group. Three of the galaxies have distorted shapes, elongated spiral arms, and long, gaseous tidal tails containing myriad star clusters, proof of their close encounters. These interactions have sparked a

PIX4565504

Galactic Center Region - The Galactic Center - The Galactic Center Region of the center of our galaxy seen the Chandra, Spitzer and Hubble satellites. The galactic center (Sagittarius A*) is located in the white area in the middle to the right of the image. In yellow, near-infrared images obtained by the Hubble Space Telescope; in red, infrared images obtained by the Spitzer Space Telescope; in blue and purple, X-ray observations obtained by the Chandra Space Telescope. Nasa's Great Observatories - the Hubble Space Telescope, the Spitzer Space Telescope, and the Chandra X-ray Observatory - have collaborated to produce an unprecedented image of the central region of our Milky Way galaxy. In this spectacular image, observations using infrared light and X-ray light see through the obscuring dust and reveal the intense activity near the galactic core. Note that the center of the galaxy is located within the bright white region to the right of and just below the middle of the image. The ent

Galactic Center Region - The Galactic Center - The Galactic Center Region of the center of our galaxy seen the Chandra, Spitzer and Hubble satellites. The galactic center (Sagittarius A*) is located in the white area in the middle to the right of the image. In yellow, near-infrared images obtained by the Hubble Space Telescope; in red, infrared images obtained by the Spitzer Space Telescope; in blue and purple, X-ray observations obtained by the Chandra Space Telescope. Nasa's Great Observatories - the Hubble Space Telescope, the Spitzer Space Telescope, and the Chandra X-ray Observatory - have collaborated to produce an unprecedented image of the central region of our Milky Way galaxy. In this spectacular image, observations using infrared light and X-ray light see through the obscuring dust and reveal the intense activity near the galactic core. Note that the center of the galaxy is located within the bright white region to the right of and just below the middle of the image. The ent

PIX4637984

Centaurus A elliptical galaxy (NGC 5128) in Centaurus - The radio galaxy Centaurus A (NGC 5128) - The galaxy NGC 5128 is located about 13 million years away from Earth in the southern constellation of Centaurus. A broad dark band crosses it in the middle, a probable vestige of a collision with a spiral galaxy. This giant galaxy is a powerful radio source known as Centaurus A. It is an active galaxy whose energy comes from a supermassive black hole. Image obtained with a 35 cm telescope, 11 hours of cumulative poses. NGC 5128 is the nearest large elliptical galaxies to our sun at about 13 million light years. It is also the nearest of the giant radio galaxies, possessing an active galactic nucleus (AGN) and optically one of the most luminous galaxies in the sky. In 1949, NGC 5128 was found to be a loud source of radio energy, in fact the loudest radio source in its region of the sky (second overall to Cygnus A), earning it the designation Centarus A. As a radio galaxy it releases 1000 t

Centaurus A elliptical galaxy (NGC 5128) in Centaurus - The radio galaxy Centaurus A (NGC 5128) - The galaxy NGC 5128 is located about 13 million years away from Earth in the southern constellation of Centaurus. A broad dark band crosses it in the middle, a probable vestige of a collision with a spiral galaxy. This giant galaxy is a powerful radio source known as Centaurus A. It is an active galaxy whose energy comes from a supermassive black hole. Image obtained with a 35 cm telescope, 11 hours of cumulative poses. NGC 5128 is the nearest large elliptical galaxies to our sun at about 13 million light years. It is also the nearest of the giant radio galaxies, possessing an active galactic nucleus (AGN) and optically one of the most luminous galaxies in the sky. In 1949, NGC 5128 was found to be a loud source of radio energy, in fact the loudest radio source in its region of the sky (second overall to Cygnus A), earning it the designation Centarus A. As a radio galaxy it releases 1000 t

R. Gendler

PIX4612271

Globular cluster NGC 6401 in Ophiuchus - Globular cluster NGC 6401 in Ophiuchus - The NASA/ESA Hubble Space Telescope has used its powerful optics to separate the globular cluster NGC 6401 into its constituent stars. What was once only visible as a ghostly mist in the eyepieces of astronomical instruments has been transformed into a stunning stellar landscape. NGC 6401 can be found within the constellation of Ophiuchus (The Serpent Bearer). The globular cluster itself is relatively faint, so a telescope and some observational experience are required to see it. Globular clusters are very rich, and generally spherical, collections of stars, hence the name. They orbit the cores of galaxies, with the force of gravity also keeping the stars bound as a group. There are around 160 globular clusters associated with our Milky Way, of which NGC 6401 is one. These objects are very old, containing some of the most ancient stars known. However, there are many mysteries surrounding them, with the or

Globular cluster NGC 6401 in Ophiuchus - Globular cluster NGC 6401 in Ophiuchus - The NASA/ESA Hubble Space Telescope has used its powerful optics to separate the globular cluster NGC 6401 into its constituent stars. What was once only visible as a ghostly mist in the eyepieces of astronomical instruments has been transformed into a stunning stellar landscape. NGC 6401 can be found within the constellation of Ophiuchus (The Serpent Bearer). The globular cluster itself is relatively faint, so a telescope and some observational experience are required to see it. Globular clusters are very rich, and generally spherical, collections of stars, hence the name. They orbit the cores of galaxies, with the force of gravity also keeping the stars bound as a group. There are around 160 globular clusters associated with our Milky Way, of which NGC 6401 is one. These objects are very old, containing some of the most ancient stars known. However, there are many mysteries surrounding them, with the or

PIX4564826

Nebula N81 in the Small Magellan Cloud - Celestial Maternity Ward N81 in the Small Magellanic Cloud A NASA Hubble Space Telescope “” family portrait””” of young, ultra - bright stars nested in their embryonic cloud of glowing gases. The celestial maternity ward, called N81, is located 200,000 light - years away in the Small Magellanic Cloud (SMC), a small irregular satellite galaxy of our Milky Way. Hubble's exquisite resolution allows astronomers to pinpoint 50 separate stars tightly packed in the nebula's core within a 10 light - year diameter - slightly more than twice the distance between earth and the nearest star to our sun. The closest pair of stars is only 1/3 of a light - year apart (0.3 arcseconds in the sky). This furious rate of mass loss from these super - hot stars is evident in the Hubble picture that reveals dramatic shapes sculpted in the nebula's wall of glowing gases by violent stellar winds and shock waves. A pair of bright stars in the center of the nebula is pouri

Nebula N81 in the Small Magellan Cloud - Celestial Maternity Ward N81 in the Small Magellanic Cloud A NASA Hubble Space Telescope “” family portrait””” of young, ultra - bright stars nested in their embryonic cloud of glowing gases. The celestial maternity ward, called N81, is located 200,000 light - years away in the Small Magellanic Cloud (SMC), a small irregular satellite galaxy of our Milky Way. Hubble's exquisite resolution allows astronomers to pinpoint 50 separate stars tightly packed in the nebula's core within a 10 light - year diameter - slightly more than twice the distance between earth and the nearest star to our sun. The closest pair of stars is only 1/3 of a light - year apart (0.3 arcseconds in the sky). This furious rate of mass loss from these super - hot stars is evident in the Hubble picture that reveals dramatic shapes sculpted in the nebula's wall of glowing gases by violent stellar winds and shock waves. A pair of bright stars in the center of the nebula is pouri

PIX4620890

Barree spiral galaxy UGC 12158 - Galaxy UGC 12158 - The galaxy UGC 12158, is about 400 million light years away from Earth in the constellation Pegase. In this image obtained by the Hubble space telescope, a blue star is visible near the center of the galaxy (lower left), it is a supernova, SN 2004ef. The galaxy captured in this image, called UGC 12158, certainly isn't camera - shy: this spiral stunner is posing face - on to the NASA/ESA Hubble Space Telescope's Advanced Camera for Surveys, revealing its structure in fine detail. UGC 12158 is an excellent example of a barred spiral galaxy in the Hubble sequence - - a scheme used to categorise galaxies based on their shapes. Barred spirals, as the name suggest, feature spectacular swirling arms of stars that emanate from a bar - shaped centre. Such bar structures are common, being found in about two thirds of spiral galaxies, and are thought to act as funnels, guiding gas to their galactic centres where it accumulates to form newborn st

Barree spiral galaxy UGC 12158 - Galaxy UGC 12158 - The galaxy UGC 12158, is about 400 million light years away from Earth in the constellation Pegase. In this image obtained by the Hubble space telescope, a blue star is visible near the center of the galaxy (lower left), it is a supernova, SN 2004ef. The galaxy captured in this image, called UGC 12158, certainly isn't camera - shy: this spiral stunner is posing face - on to the NASA/ESA Hubble Space Telescope's Advanced Camera for Surveys, revealing its structure in fine detail. UGC 12158 is an excellent example of a barred spiral galaxy in the Hubble sequence - - a scheme used to categorise galaxies based on their shapes. Barred spirals, as the name suggest, feature spectacular swirling arms of stars that emanate from a bar - shaped centre. Such bar structures are common, being found in about two thirds of spiral galaxies, and are thought to act as funnels, guiding gas to their galactic centres where it accumulates to form newborn st

PIX4613612

Planetary nebula NGC 6369 in Ophiuchus/HST - NGC 6369 is known to amateur astronomers as the “” Little Ghost Nebula,”” because it appears as a small, ghostly cloud surrounding the faint, dying central star. NGC 6369 lies in the direction of the constellation Ophiuchus, at a distance estimated to be between about 2,000 and 5,000 light - years from Earth. When a star with a mass similar to that of our own Sun nears the end of its lifetime, it expands in size to become a red giant. The red - giant stage ends when the star expels its outer layers into space, producing a faintly glowing nebula. Astronomers call such an object a planetary nebula, because its round shape resembles that of a planet when viewed with a small telescope. The Hubble photograph of NGC 6369, captured with the Wide Field Planetary Camera 2 (WFPC2) in February 2002, reveals remarkable details of the ejection process that are not visible from ground - based telescopes because of the blurring produced by the Earth's atmo

Planetary nebula NGC 6369 in Ophiuchus/HST - NGC 6369 is known to amateur astronomers as the “” Little Ghost Nebula,”” because it appears as a small, ghostly cloud surrounding the faint, dying central star. NGC 6369 lies in the direction of the constellation Ophiuchus, at a distance estimated to be between about 2,000 and 5,000 light - years from Earth. When a star with a mass similar to that of our own Sun nears the end of its lifetime, it expands in size to become a red giant. The red - giant stage ends when the star expels its outer layers into space, producing a faintly glowing nebula. Astronomers call such an object a planetary nebula, because its round shape resembles that of a planet when viewed with a small telescope. The Hubble photograph of NGC 6369, captured with the Wide Field Planetary Camera 2 (WFPC2) in February 2002, reveals remarkable details of the ejection process that are not visible from ground - based telescopes because of the blurring produced by the Earth's atmo

PIX4623194

Centaurus A Elliptical Galaxy (NGC 5128) in the Centaur - Galaxy Centaurus A - The NGC 5128 galaxy is about 13 million years away - light from Earth. This image obtained by the Hubble Space Telescope in 1998 shows the star flames that occur in the dark band of the galaxy. In blue, these are the clusters of newly shaped young stars. At the top left, a photo of the galaxy obtained from the ground. This giant galaxy is a powerful radio source known as Centaurus A. It is an active galaxy whose energy comes from a supermassive black hole. NGC 5128 is the nearest large elliptical galaxies to our sun. It is also the nearest of the giant radio galaxies, possessing an active galactic nucleus (AGN) and optically one of the most luminous galaxies in the sky. Among many other things NGC 5128 is also the prototypical postmerger elliptical galaxy. Structural peculiarities including the prominent rotating disk of stars and gas and the complex shell structure of its halo point to a large scale merger

Centaurus A Elliptical Galaxy (NGC 5128) in the Centaur - Galaxy Centaurus A - The NGC 5128 galaxy is about 13 million years away - light from Earth. This image obtained by the Hubble Space Telescope in 1998 shows the star flames that occur in the dark band of the galaxy. In blue, these are the clusters of newly shaped young stars. At the top left, a photo of the galaxy obtained from the ground. This giant galaxy is a powerful radio source known as Centaurus A. It is an active galaxy whose energy comes from a supermassive black hole. NGC 5128 is the nearest large elliptical galaxies to our sun. It is also the nearest of the giant radio galaxies, possessing an active galactic nucleus (AGN) and optically one of the most luminous galaxies in the sky. Among many other things NGC 5128 is also the prototypical postmerger elliptical galaxy. Structural peculiarities including the prominent rotating disk of stars and gas and the complex shell structure of its halo point to a large scale merger

PIX4612157

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

Star T - Tauri in Orion - Bow Shock around T - Tauri Star in the Orion Nebula - LL Ori is a star T - Tauri located about 1500 years ago - light from Earth in Orion's nebula. This young star emits a powerful stellar wind that hits the surrounding gas creating an arc-shaped shock wave Image obtained by the Hubble space telescope in February 1995. A bow shock can be created in space when two streams of gas collide. The star LL Ori emits a vigorous solar wind, a stream of charged particles moving rapidly outward from the star. Our own Sun has a less energetic version of this wind that is responsible for auroral displays on the Earth. The material in the fast wind from LL Ori collides with slow - moving gas evaporating away from the center of the Orion Nebula, which is located to the lower right in this Heritage image. The surface where the two winds collide is the crescent - shaped bow shock seen in the image. Unlike a water wave made by a ship, this interstellar bow shock is a three - dim

Star T - Tauri in Orion - Bow Shock around T - Tauri Star in the Orion Nebula - LL Ori is a star T - Tauri located about 1500 years ago - light from Earth in Orion's nebula. This young star emits a powerful stellar wind that hits the surrounding gas creating an arc-shaped shock wave Image obtained by the Hubble space telescope in February 1995. A bow shock can be created in space when two streams of gas collide. The star LL Ori emits a vigorous solar wind, a stream of charged particles moving rapidly outward from the star. Our own Sun has a less energetic version of this wind that is responsible for auroral displays on the Earth. The material in the fast wind from LL Ori collides with slow - moving gas evaporating away from the center of the Orion Nebula, which is located to the lower right in this Heritage image. The surface where the two winds collide is the crescent - shaped bow shock seen in the image. Unlike a water wave made by a ship, this interstellar bow shock is a three - dim

PIX4572363

Detail of the Eagle Nebula (M16) dans le serpent/HST - This eerie, dark structure, resembling an imaginary sea serpent's head, is a column of cool molecular hydrogen gas (two atoms of hydrogen in each molecule) and dust that is an incubator for new stars. The stars are embedded inside finger - like protrusions extending from the top of the nebula. Each “” fingertip”” is somewhat larger than our own solar system. The pillar is slowly eroding away by the ultraviolet light from nearby hot stars, a process called “” photoevaporation””. As it does, small globules of especially dense gas buried within the cloud is uncovered. These globules have been dubbed “” Eggs”” - - an acronym for “” Evaporating Gaseous Globules””. The shadows of the Eggs protect gas behind them, resulting in the finger - like structures at the top of the cloud. Forming inside at least some of the Eggs are embryonic stars - - stars that abruptly stop growing when the Eggs are uncovered and they are separated from the lar

Detail of the Eagle Nebula (M16) dans le serpent/HST - This eerie, dark structure, resembling an imaginary sea serpent's head, is a column of cool molecular hydrogen gas (two atoms of hydrogen in each molecule) and dust that is an incubator for new stars. The stars are embedded inside finger - like protrusions extending from the top of the nebula. Each “” fingertip”” is somewhat larger than our own solar system. The pillar is slowly eroding away by the ultraviolet light from nearby hot stars, a process called “” photoevaporation””. As it does, small globules of especially dense gas buried within the cloud is uncovered. These globules have been dubbed “” Eggs”” - - an acronym for “” Evaporating Gaseous Globules””. The shadows of the Eggs protect gas behind them, resulting in the finger - like structures at the top of the cloud. Forming inside at least some of the Eggs are embryonic stars - - stars that abruptly stop growing when the Eggs are uncovered and they are separated from the lar

PIX4620033

The galactic center seen by Spitzer Space Telescope - The galactic center region seen by Spitzer satellite. The area photographed extends over 890 light-years and over 640 light-years high. In visible light, this area is hidden by a large amount of interstellar dust. This picture in false colors shows the old and cold stars in blue, and the red regions the hot and massive stars. Dark and bright filamentous clouds are star-forming regions. The brightest area in the center of the image is the center of our galaxy which houses a supermassive black hole. This infrared image from Nasa's Spitzer Space Telescope shows hundreds of thousands of stars crowded into the swirling core of our spiral Milky Way galaxy. In visible-light pictures, this region cannot be seen at all because dust lying between Earth and the galactic center blocks our view. In this false-color picture, old and cool stars are blue, while dust features lit up by blazing hot, massive stars are shown in a reddish hue. Both brig

The galactic center seen by Spitzer Space Telescope - The galactic center region seen by Spitzer satellite. The area photographed extends over 890 light-years and over 640 light-years high. In visible light, this area is hidden by a large amount of interstellar dust. This picture in false colors shows the old and cold stars in blue, and the red regions the hot and massive stars. Dark and bright filamentous clouds are star-forming regions. The brightest area in the center of the image is the center of our galaxy which houses a supermassive black hole. This infrared image from Nasa's Spitzer Space Telescope shows hundreds of thousands of stars crowded into the swirling core of our spiral Milky Way galaxy. In visible-light pictures, this region cannot be seen at all because dust lying between Earth and the galactic center blocks our view. In this false-color picture, old and cool stars are blue, while dust features lit up by blazing hot, massive stars are shown in a reddish hue. Both brig

PIX4637936

Remains of supernova SN 1006 - Supernova remnant SN 1006 - Remains of supernova SN 1006 located 7000 years ago - light in the constellation Wolf. This supernova that appeared in 1006 is the result of a white dwarf star that absorbs the matter of a companion star became unstable and eventually exploded. This image is a composite of X-ray images obtained by the Chandra telescope (blue), by Cerro Tololo's 90 cm telescope (yellow) and by the Digitized Sky Survey (orange and light blue), and by the VLA and the Green Bank's telescope radio (red). Just over a thousand years ago, the stellar explosion known as supernova SN 1006 was observed. It was brighter than Venus, and visible during the day for weeks. The brightest supernova ever recorded on Earth, this spectacular light show was documented in China, Japan, Europe, and the Arab world. Astronomers now understand that SN 1006 was caused by a white dwarf star that captured mass from a companion star until the white dwarf became unstable and

Remains of supernova SN 1006 - Supernova remnant SN 1006 - Remains of supernova SN 1006 located 7000 years ago - light in the constellation Wolf. This supernova that appeared in 1006 is the result of a white dwarf star that absorbs the matter of a companion star became unstable and eventually exploded. This image is a composite of X-ray images obtained by the Chandra telescope (blue), by Cerro Tololo's 90 cm telescope (yellow) and by the Digitized Sky Survey (orange and light blue), and by the VLA and the Green Bank's telescope radio (red). Just over a thousand years ago, the stellar explosion known as supernova SN 1006 was observed. It was brighter than Venus, and visible during the day for weeks. The brightest supernova ever recorded on Earth, this spectacular light show was documented in China, Japan, Europe, and the Arab world. Astronomers now understand that SN 1006 was caused by a white dwarf star that captured mass from a companion star until the white dwarf became unstable and

PIX4583213

Colliding galaxy Ngc 6745 in Lyra - Colliding galaxy NGC 6745 in Lyra - The spiral galaxy NGC 6745 is located about 206 million years away - light from Earth. This galaxy is double; a second galaxy at the bottom right of the image collides with it, causing star formation. Image obtained by the Hubble Space Telescope in 1996. A large spiral galaxy, with its nucleus still intact, peers at the smaller passing galaxy (almost out of the field of view at lower right). These galaxies did not merely interact gravitationally as they passed one another, they actually collided. When galaxies collide, the stars that normally comprise the major portion of the luminous mass of each of the two galaxies will almost never collide with each other but will pass rather freely between each other with little damage. This occurs because the physical size of individual stars is tiny compared to their typical separations, making the chance of physical encounter relatively small. In our own Milky Way galaxy, th

Colliding galaxy Ngc 6745 in Lyra - Colliding galaxy NGC 6745 in Lyra - The spiral galaxy NGC 6745 is located about 206 million years away - light from Earth. This galaxy is double; a second galaxy at the bottom right of the image collides with it, causing star formation. Image obtained by the Hubble Space Telescope in 1996. A large spiral galaxy, with its nucleus still intact, peers at the smaller passing galaxy (almost out of the field of view at lower right). These galaxies did not merely interact gravitationally as they passed one another, they actually collided. When galaxies collide, the stars that normally comprise the major portion of the luminous mass of each of the two galaxies will almost never collide with each other but will pass rather freely between each other with little damage. This occurs because the physical size of individual stars is tiny compared to their typical separations, making the chance of physical encounter relatively small. In our own Milky Way galaxy, th

PIX4612985

Proto - planetary nebula OH231.8+4.2 dans la Poupe/HST

Proto - planetary nebula OH231.8+4.2 dans la Poupe/HST

PIX4623703

Star Formation in the DR21 Region - Star Formation in the DR21 Region - This star formation region is about 6200 years old - light. Hidden in light visible by interstellar dust, this region rises in infrared light. Gas filaments appear in red; they emphasize the presence of aromatic polycyclic hydrocarbons (PAH); they are organic molecules composed of carbon atoms and hydrogen that could be the germs on which the first bricks of life appeared. Composite image in different wavelengths obtained by the Spitzer space telescope; in blue the visible light, in yellow and red the infrared light. Hidden behind a shroud of dust in the constellation Cygnus is a stellar nursery called DR21, which is giving birth to some of the most massive stars in our galaxy. Visible light images reveal no trace of this interstellar cauldron because of heavy dust obscuration. This image from Nasa's Spitzer Space Telescope allow us to peek behind the cosmic veil and pinpoint one of the most massive natal stars yet

Star Formation in the DR21 Region - Star Formation in the DR21 Region - This star formation region is about 6200 years old - light. Hidden in light visible by interstellar dust, this region rises in infrared light. Gas filaments appear in red; they emphasize the presence of aromatic polycyclic hydrocarbons (PAH); they are organic molecules composed of carbon atoms and hydrogen that could be the germs on which the first bricks of life appeared. Composite image in different wavelengths obtained by the Spitzer space telescope; in blue the visible light, in yellow and red the infrared light. Hidden behind a shroud of dust in the constellation Cygnus is a stellar nursery called DR21, which is giving birth to some of the most massive stars in our galaxy. Visible light images reveal no trace of this interstellar cauldron because of heavy dust obscuration. This image from Nasa's Spitzer Space Telescope allow us to peek behind the cosmic veil and pinpoint one of the most massive natal stars yet

PIX4621115

Planetary nebula CRL 2688 dans le Swan/HST - This image of the Egg Nebula, also known as CRL2688 and located roughly 3,000 light - years from us, was taken in red light with the Wide Field and Planetary Camera 2 (WFPC2) aboard Nasa's Hubble Space Telescope.The image shows a pair of mysterious “” searchlight” beams emerging from a hidden star, criss - Yeah. crossed by numerous bright arcs. This image sheds new light on the poorly understood ejection of stellar matter which accompanies the slow death of Sun - like stars. The image is shown in false color. The central star in CRL2688 was a red giant a few hundred years ago. The nebula is really a large cloud of dust and gas ejected by the star, expanding at a speed of 20 km/s (115,000 mph). A dense cocoon of dust (the dark band in the image center) enshrouds the star and hides it from our view. Starlight escapes more easily in directions where the cocoon is thinner, and is reflected towards us by dust particles in the cloud, giving it its

Planetary nebula CRL 2688 dans le Swan/HST - This image of the Egg Nebula, also known as CRL2688 and located roughly 3,000 light - years from us, was taken in red light with the Wide Field and Planetary Camera 2 (WFPC2) aboard Nasa's Hubble Space Telescope.The image shows a pair of mysterious “” searchlight” beams emerging from a hidden star, criss - Yeah. crossed by numerous bright arcs. This image sheds new light on the poorly understood ejection of stellar matter which accompanies the slow death of Sun - like stars. The image is shown in false color. The central star in CRL2688 was a red giant a few hundred years ago. The nebula is really a large cloud of dust and gas ejected by the star, expanding at a speed of 20 km/s (115,000 mph). A dense cocoon of dust (the dark band in the image center) enshrouds the star and hides it from our view. Starlight escapes more easily in directions where the cocoon is thinner, and is reflected towards us by dust particles in the cloud, giving it its

PIX4623752

Planetary nebula NGC 2818 - Planetary nebula NGC 2818 in Pyxis - The open cluster NGC 2818A in the southern constellation of the Compsole is distinguished by the fact that most of its bright stars have already become supernovae; this indicates that this cluster must be very old, perhaps a billion years. It has a planetary nebula, NGC 2818, photographed here by the Hubble space telescope in November 2008. A planetary nebula is an end-of-life star. NGC 2818 (also called PLN 261+8.1) is located about 10,000 light years from Earth. The unique planetary nebula NGC 2818 is nested inside the open star cluster NGC 2818A. Both the cluster and the nebula reside over 10,000 light - years away, in the southern constellation Pyxis (the Compasss). NGC 2818 is one of very few planetary nebulae in our galaxy located within an open cluster. Open clusters, in general, are loosely bound and they disperse over hundreds of millions of years. Stars that form planetary nebulae typically live for billions of

Planetary nebula NGC 2818 - Planetary nebula NGC 2818 in Pyxis - The open cluster NGC 2818A in the southern constellation of the Compsole is distinguished by the fact that most of its bright stars have already become supernovae; this indicates that this cluster must be very old, perhaps a billion years. It has a planetary nebula, NGC 2818, photographed here by the Hubble space telescope in November 2008. A planetary nebula is an end-of-life star. NGC 2818 (also called PLN 261+8.1) is located about 10,000 light years from Earth. The unique planetary nebula NGC 2818 is nested inside the open star cluster NGC 2818A. Both the cluster and the nebula reside over 10,000 light - years away, in the southern constellation Pyxis (the Compasss). NGC 2818 is one of very few planetary nebulae in our galaxy located within an open cluster. Open clusters, in general, are loosely bound and they disperse over hundreds of millions of years. Stars that form planetary nebulae typically live for billions of

PIX4622959

Stars cluster in the Nebula of the Eagle - Young stars in the Eagle nebula - Detail on young stars located in the cluster of stars NGC 6611 of the Nebula of the Eagle (M16). Image obtained by the Hubble Space Telescope. A spectacular section of the well - known Eagle Nebula has been targeted by the NASA/ESA Hubble Space Telescope. This collection of dazzling stars is called NGC 6611, an open star cluster that formed about 5.5 million years ago and is found approximately 6500 light - years from the Earth. It is a very young cluster, containing many hot, blue stars, whose fierce ultraviolet glow make the surrounding Eagle Nebula glow brightly. The cluster and the associated nebula together are also known as Messier 16. Astronomers refer to areas like the Eagle Nebula as HII regions. This is the scientific notation for ionised hydrogen from which the region is largely made. Extrapolating far into the future, this HII region will eventually disperse, helped along by shockwaves from superno

Stars cluster in the Nebula of the Eagle - Young stars in the Eagle nebula - Detail on young stars located in the cluster of stars NGC 6611 of the Nebula of the Eagle (M16). Image obtained by the Hubble Space Telescope. A spectacular section of the well - known Eagle Nebula has been targeted by the NASA/ESA Hubble Space Telescope. This collection of dazzling stars is called NGC 6611, an open star cluster that formed about 5.5 million years ago and is found approximately 6500 light - years from the Earth. It is a very young cluster, containing many hot, blue stars, whose fierce ultraviolet glow make the surrounding Eagle Nebula glow brightly. The cluster and the associated nebula together are also known as Messier 16. Astronomers refer to areas like the Eagle Nebula as HII regions. This is the scientific notation for ionised hydrogen from which the region is largely made. Extrapolating far into the future, this HII region will eventually disperse, helped along by shockwaves from superno

PIX4620069

Young stars in Rho Ophiuchi - Young stars in Rho Ophiuchi - Image of the central part of Rho Ophiuchi obtained in infrared by the Spitzer space telescope. Rho Ophiuchi is a vast dark cloud of molecular hydrogen located 407 years - light from Earth in the constellations of Ophiuchus and Scorpio. More than 300 young stars aged only 300,000 years have been observed. On this picture in false colors highlighting the temperature differences present in this cloud, the younger stars appear in red, the more evolute stars in blue. Newborn stars peek out from beneath their natal blanket of dust in this dynamic image of the Rho Ophiuchi dark cloud from Nasa's Spitzer Space Telescope. Called “” Rho Oph””” by astronomers, it's one of the closest star - forming regions to our own solar system. Located near the constellations Scorpius and Ophiuchus, the nebula is about 407 light years away from Earth. Rho Oph is a complex made up of a large main cloud of molecular hydrogen, a key molecule allowing new

Young stars in Rho Ophiuchi - Young stars in Rho Ophiuchi - Image of the central part of Rho Ophiuchi obtained in infrared by the Spitzer space telescope. Rho Ophiuchi is a vast dark cloud of molecular hydrogen located 407 years - light from Earth in the constellations of Ophiuchus and Scorpio. More than 300 young stars aged only 300,000 years have been observed. On this picture in false colors highlighting the temperature differences present in this cloud, the younger stars appear in red, the more evolute stars in blue. Newborn stars peek out from beneath their natal blanket of dust in this dynamic image of the Rho Ophiuchi dark cloud from Nasa's Spitzer Space Telescope. Called “” Rho Oph””” by astronomers, it's one of the closest star - forming regions to our own solar system. Located near the constellations Scorpius and Ophiuchus, the nebula is about 407 light years away from Earth. Rho Oph is a complex made up of a large main cloud of molecular hydrogen, a key molecule allowing new

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Gl 581c: discovery of a habitable planet - Gl 581c: discovery of an habitable planet - Artist's view of the exoplanet Gliese 581c. Gliese 581c, with a radius of 1.5 times that of the Earth, is the first exoplanet gathering the necessary elements to imagine the existence of a possible extra-terrestrial life. From its surface, its star, about 100 times less bright than our Sun, must be large in the sky because of its proximity to the planet. In April 2007 the Geneva Observatory in Switzerland announced the discovery of a “super - earth”” extrasolar planet orbiting the red dwarf star Gliese 581. Dubbed Gliese 581 c, it's been called a super - earth because it is one of the few known extrasolar planets that has a mass near Earth's, and the only one to occupy its sun's “” habitable zone.”” Gliese 581 c is believed to be about five times more massive than the Earth with a diameter about half - again as large as Earth's. Depending upon the planet's composition, whether mostly rock or a combin

Gl 581c: discovery of a habitable planet - Gl 581c: discovery of an habitable planet - Artist's view of the exoplanet Gliese 581c. Gliese 581c, with a radius of 1.5 times that of the Earth, is the first exoplanet gathering the necessary elements to imagine the existence of a possible extra-terrestrial life. From its surface, its star, about 100 times less bright than our Sun, must be large in the sky because of its proximity to the planet. In April 2007 the Geneva Observatory in Switzerland announced the discovery of a “super - earth”” extrasolar planet orbiting the red dwarf star Gliese 581. Dubbed Gliese 581 c, it's been called a super - earth because it is one of the few known extrasolar planets that has a mass near Earth's, and the only one to occupy its sun's “” habitable zone.”” Gliese 581 c is believed to be about five times more massive than the Earth with a diameter about half - again as large as Earth's. Depending upon the planet's composition, whether mostly rock or a combin

Walter B Myers

PIX4573770

Irregular dwarf galaxy I Zwicky 18 - Irregular dwarf galaxy I Zwicky 18 - The irregular dwarf galaxy I Zwicky 18 is located 59 million years - light in the Great Bear and extends over about 3000 years - light. The two bright white spots are star-forming regions. At the top left, another galaxy is visible. This galaxy could be interacting with I Zwicky 18. This image is the result of observations made by the Hubble Space Telescope in 2005 and 2006. Called I Zwicky 18, this galaxy has a youthful appearance that resembles galaxies typically found only in the early universe. Hubble has now found faint, older stars within this galaxy, suggesting that the galaxy may have formed at the same time as most other galaxies. I Zwicky 18 is classified as a dwarf irregular galaxy and is much smaller than our Milky Way Galaxy. The concentrated bluish - white knots embedded in the heart of the galaxy are two major starburst regions where stars are forming at a furious rate. The wispy blue filaments sur

Irregular dwarf galaxy I Zwicky 18 - Irregular dwarf galaxy I Zwicky 18 - The irregular dwarf galaxy I Zwicky 18 is located 59 million years - light in the Great Bear and extends over about 3000 years - light. The two bright white spots are star-forming regions. At the top left, another galaxy is visible. This galaxy could be interacting with I Zwicky 18. This image is the result of observations made by the Hubble Space Telescope in 2005 and 2006. Called I Zwicky 18, this galaxy has a youthful appearance that resembles galaxies typically found only in the early universe. Hubble has now found faint, older stars within this galaxy, suggesting that the galaxy may have formed at the same time as most other galaxies. I Zwicky 18 is classified as a dwarf irregular galaxy and is much smaller than our Milky Way Galaxy. The concentrated bluish - white knots embedded in the heart of the galaxy are two major starburst regions where stars are forming at a furious rate. The wispy blue filaments sur

PIX4613873

Nebula NGC 604 in the galaxy M33 - NGC 604 star forming nebula - NGC 604, is a very large star-forming region located in the galaxy M33 of the Triangle. This image is a composite of X-ray images (blue) obtained by the Chandra Space Telescope and visible (green and red) by the Hubble Space Telescope. The study of very hot gas observed in X-ray allows us to better understand the star formation activity within this nebula. NGC 604, is one of the largest known seething cauldrons of star birth in a nearby galaxy. NGC 604 is similar to familiar star - birth regions in our Milky Way galaxy, such as the Orion Nebula, but it is vastly larger in extent and contains many more recently formed stars. This monstrous star - birth region contains more than 200 brilliant blue stars within a cloud of glowing gases some 1,300 light - years across, nearly 100 times the size of the Orion Nebula. The bright stars in NGC 604 are extremely young having formed a mere 3 million years ago. The most massive stars

Nebula NGC 604 in the galaxy M33 - NGC 604 star forming nebula - NGC 604, is a very large star-forming region located in the galaxy M33 of the Triangle. This image is a composite of X-ray images (blue) obtained by the Chandra Space Telescope and visible (green and red) by the Hubble Space Telescope. The study of very hot gas observed in X-ray allows us to better understand the star formation activity within this nebula. NGC 604, is one of the largest known seething cauldrons of star birth in a nearby galaxy. NGC 604 is similar to familiar star - birth regions in our Milky Way galaxy, such as the Orion Nebula, but it is vastly larger in extent and contains many more recently formed stars. This monstrous star - birth region contains more than 200 brilliant blue stars within a cloud of glowing gases some 1,300 light - years across, nearly 100 times the size of the Orion Nebula. The bright stars in NGC 604 are extremely young having formed a mere 3 million years ago. The most massive stars

PIX4617509

Supernova Sn 2004dj in the galaxy NGC 2403 - The explosion of a massive star blazes with the light of 200 million Suns in this NASA Hubble Space Telescope image. The supernova is so bright in this image that it easily could be mistaken for a foreground star in our Milky Way Galaxy. And yet, this supernova, called SN 2004dj, resides far beyond our galaxy. Its home is in the outskirts of NGC 2403, a galaxy located 11 million light - years from Earth. Although the supernova is far from Earth, it is the closest stellar explosion discovered in more than a decade. The star that became SN 2004dj may have been about 15 times as massive as the Sun, and only about 14 million years old. (Massive stars live much shorter lives than the Sun; they have more fuel to “” burn”” through nuclear fusion, but they use it up at a disproportionately faster rate.) The large number of massive stars in NGC 2403 leads to a high supernova rate. Two other supernovae have been seen in this galaxy during the past hal

Supernova Sn 2004dj in the galaxy NGC 2403 - The explosion of a massive star blazes with the light of 200 million Suns in this NASA Hubble Space Telescope image. The supernova is so bright in this image that it easily could be mistaken for a foreground star in our Milky Way Galaxy. And yet, this supernova, called SN 2004dj, resides far beyond our galaxy. Its home is in the outskirts of NGC 2403, a galaxy located 11 million light - years from Earth. Although the supernova is far from Earth, it is the closest stellar explosion discovered in more than a decade. The star that became SN 2004dj may have been about 15 times as massive as the Sun, and only about 14 million years old. (Massive stars live much shorter lives than the Sun; they have more fuel to “” burn”” through nuclear fusion, but they use it up at a disproportionately faster rate.) The large number of massive stars in NGC 2403 leads to a high supernova rate. Two other supernovae have been seen in this galaxy during the past hal

PIX4582457

Planetary nebula NGC 6543 in the Dragon/HST - This NASA Hubble Space Telescope image shows one of the most complex planetary nebulae ever seen, NGC 6543, nicknamed the “Cat's Eye Nebula.””” Hubble reveals surprisingly intricate structures including concentric gas shells, jets of high - speed gas and unusual shock - induced knots of gas. Estimated to be 1,000 years old, the nebula is a visual “” fossil record”” of the dynamics and late evolution of a dying star. A preliminary interpretation suggests that the star might be a double - star system. The dynamical effects of two stars orbiting one another most easily explains the intricate structures, which are much more complicated than features seen in most planetary nebulae. (The two stars are too close together to be individually resolved by Hubble, and instead, appear as a single point of light at the center of the nebula.) According to this model, a fast “” stellar wind””” of gas blown off the central star created the elongated shell o

Planetary nebula NGC 6543 in the Dragon/HST - This NASA Hubble Space Telescope image shows one of the most complex planetary nebulae ever seen, NGC 6543, nicknamed the “Cat's Eye Nebula.””” Hubble reveals surprisingly intricate structures including concentric gas shells, jets of high - speed gas and unusual shock - induced knots of gas. Estimated to be 1,000 years old, the nebula is a visual “” fossil record”” of the dynamics and late evolution of a dying star. A preliminary interpretation suggests that the star might be a double - star system. The dynamical effects of two stars orbiting one another most easily explains the intricate structures, which are much more complicated than features seen in most planetary nebulae. (The two stars are too close together to be individually resolved by Hubble, and instead, appear as a single point of light at the center of the nebula.) According to this model, a fast “” stellar wind””” of gas blown off the central star created the elongated shell o

PIX4623213

Barree spiral galaxy NGC 2146 in the Giraffe - Barred spiral galaxy NGC 2146 in Camelopardalis - NGC 2146 is a barree spiral galaxy located about 70 million years ago - light from Earth in the constellation Giraffe (Camelopardalis). Image obtained by the Hubble Space Telescope (HST). NGC 2146 is classified as a barred spiral due to its shape, but the most distinctive feature is the dusty spiral arm that has looped in front of the galaxy's core as seen from our perspective. The forces required to pull this structure out of its natural shape and twist it up to 45 degrees are colossal. The most likely explanation is that a neighbouring galaxy is gravitationally perturbing it and distorting the orbits of many of NGC 2146's stars. It is probable that we are currently witnessing the end stages of a process which has been occurring for tens of millions of years. NCG 2146 is undergoing intense bouts of star formation, to such an extent that it is referred to as a starburst galaxy. This is a co

Barree spiral galaxy NGC 2146 in the Giraffe - Barred spiral galaxy NGC 2146 in Camelopardalis - NGC 2146 is a barree spiral galaxy located about 70 million years ago - light from Earth in the constellation Giraffe (Camelopardalis). Image obtained by the Hubble Space Telescope (HST). NGC 2146 is classified as a barred spiral due to its shape, but the most distinctive feature is the dusty spiral arm that has looped in front of the galaxy's core as seen from our perspective. The forces required to pull this structure out of its natural shape and twist it up to 45 degrees are colossal. The most likely explanation is that a neighbouring galaxy is gravitationally perturbing it and distorting the orbits of many of NGC 2146's stars. It is probable that we are currently witnessing the end stages of a process which has been occurring for tens of millions of years. NCG 2146 is undergoing intense bouts of star formation, to such an extent that it is referred to as a starburst galaxy. This is a co

PIX4609999

Galaxy NGC 4631 in Hunting Dogs - Spiral galaxy NGC 4631 in Canes Venatici - Spiral galaxy seen by the slice located at a distance of 30 million years - light. Image obtained by the Hubble Space Telescope (HST). The NASA/ESA Hubble Space Telescope has peered deep into NGC 4631, better known as the Whale Galaxy. Here, a profusion of starbirth lights up the galactic centre, revealing bands of dark material between us and the starburst. The galaxy's activity tapers off in its outer regions where there are fewer stars and less dust, but these are still punctuated by pockets of star formation. The Whale Galaxy is about 30 million light - years away from us in the constellation of Canes Venatici (The Hunting Dogs) and is a spiral galaxy much like the Milky Way. From our vantage point, however, we see the Whale Galaxy edge - on, seeing its glowing centre through dusty spiral arms. The galaxy's central bulge and asymmetric tapering disc have suggested the shape of a whale or a herring to past

Galaxy NGC 4631 in Hunting Dogs - Spiral galaxy NGC 4631 in Canes Venatici - Spiral galaxy seen by the slice located at a distance of 30 million years - light. Image obtained by the Hubble Space Telescope (HST). The NASA/ESA Hubble Space Telescope has peered deep into NGC 4631, better known as the Whale Galaxy. Here, a profusion of starbirth lights up the galactic centre, revealing bands of dark material between us and the starburst. The galaxy's activity tapers off in its outer regions where there are fewer stars and less dust, but these are still punctuated by pockets of star formation. The Whale Galaxy is about 30 million light - years away from us in the constellation of Canes Venatici (The Hunting Dogs) and is a spiral galaxy much like the Milky Way. From our vantage point, however, we see the Whale Galaxy edge - on, seeing its glowing centre through dusty spiral arms. The galaxy's central bulge and asymmetric tapering disc have suggested the shape of a whale or a herring to past

PIX4611784

Heart of the Nebula of the Lagoon (M8) in Sagittarius seen by HST - This NASA Hubble Space Telescope (HST) image reveals a pair of one - half light - year long interstellar “” twisters”” - - eerie funnels and twisted - rope structures (upper left) - - in the heart of the Lagoon Nebula (Messier 8) which lies 5,000 years - - away in the direction of the constellation Sagittarius. The central hot O type star, Herschel 36 (upper left in photo), is the primary source of the ionizing radiation for the brightest region in the nebula, called the Hourglass. Other hot stars, also present in the nebula, are ionizing the extended optical nebulosity. The ionizing radiation induces photo - evaporation of the surfaces of the clouds (seen as a blue “” mist”” at the right of the image), and drives away violent stellar winds tearing into the cool clouds.Analogous to the spectacular phenomena of Earth tornadoes, the large difference in temperature between the hot surface and cold interior of the clouds,

Heart of the Nebula of the Lagoon (M8) in Sagittarius seen by HST - This NASA Hubble Space Telescope (HST) image reveals a pair of one - half light - year long interstellar “” twisters”” - - eerie funnels and twisted - rope structures (upper left) - - in the heart of the Lagoon Nebula (Messier 8) which lies 5,000 years - - away in the direction of the constellation Sagittarius. The central hot O type star, Herschel 36 (upper left in photo), is the primary source of the ionizing radiation for the brightest region in the nebula, called the Hourglass. Other hot stars, also present in the nebula, are ionizing the extended optical nebulosity. The ionizing radiation induces photo - evaporation of the surfaces of the clouds (seen as a blue “” mist”” at the right of the image), and drives away violent stellar winds tearing into the cool clouds.Analogous to the spectacular phenomena of Earth tornadoes, the large difference in temperature between the hot surface and cold interior of the clouds,

PIX4619680

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 Spitzer space telescope reveals in yellow and red the big red stars, whose dust radiates infrared, and in blue the smaller and less evoluted stars. Omega Centauri is the biggest and brightest of the more than 150 similar objects, called globular clusters, that orbit around the outside of our Milky Way galaxy. Stargazers at southern latitudes can spot the stellar gem with the naked eye in the constellation Centaurus. While the visible - light observations highlight the cluster's millions of jam - packed stars, Spitzer's infrared eyes reveal the dustier, more evolved stars tossed throughout the region. Globular clusters are some of the oldest objects in our universe. The

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 Spitzer space telescope reveals in yellow and red the big red stars, whose dust radiates infrared, and in blue the smaller and less evoluted stars. Omega Centauri is the biggest and brightest of the more than 150 similar objects, called globular clusters, that orbit around the outside of our Milky Way galaxy. Stargazers at southern latitudes can spot the stellar gem with the naked eye in the constellation Centaurus. While the visible - light observations highlight the cluster's millions of jam - packed stars, Spitzer's infrared eyes reveal the dustier, more evolved stars tossed throughout the region. Globular clusters are some of the oldest objects in our universe. The

PIX4564424

Galaxy NGC 2403 - Spiral galaxy NGC 2403 distant about 11 - 12 million years - light in the constellation Giraffe.The supenova Sn 2004dj (visible on the left, in the middle of the picture) shines like 200 million Sun. Before exploding into a Type II supernova, the star was a star 15 times more massive than the Sun. The other bright stars visible in the image belong to our lactee path. Composite images obtained from the Hubble Space Telescope (HST) and the Subaru Telescope. The explosion of a massive star blazes with the light of 200 million Suns in this image. The supernova (middle left in the image) is so bright in this image that it easily could be mistaken for a foreground star in our Milky Way Galaxy. And yet, this supernova, called SN 2004dj (middle left), resides far beyond our galaxy. Its home is in the outskirts of NGC 2403, a galaxy located 11 million light - years from Earth. Although the supernova is far from Earth, it is the closest stellar explosion discovered in more than

Galaxy NGC 2403 - Spiral galaxy NGC 2403 distant about 11 - 12 million years - light in the constellation Giraffe.The supenova Sn 2004dj (visible on the left, in the middle of the picture) shines like 200 million Sun. Before exploding into a Type II supernova, the star was a star 15 times more massive than the Sun. The other bright stars visible in the image belong to our lactee path. Composite images obtained from the Hubble Space Telescope (HST) and the Subaru Telescope. The explosion of a massive star blazes with the light of 200 million Suns in this image. The supernova (middle left in the image) is so bright in this image that it easily could be mistaken for a foreground star in our Milky Way Galaxy. And yet, this supernova, called SN 2004dj (middle left), resides far beyond our galaxy. Its home is in the outskirts of NGC 2403, a galaxy located 11 million light - years from Earth. Although the supernova is far from Earth, it is the closest stellar explosion discovered in more than

PIX4610055

Centaurus A elliptical galaxy (NGC 5128) in Centaurus - The radio galaxy Centaurus A (NGC 5128): The galaxy NGC 5128 is located about 13 million light years away from Earth in the southern constellation of Centaurus. A broad dark band crosses it in the middle, a probable vestige of a collision with a spiral galaxy. This giant galaxy is a powerful radio source known as Centaurus A. It is an active galaxy whose energy comes from a supermassive black hole. - NGC 5128 is the nearest large elliptical galaxies to our sun at about 13 million light years. It is also the nearest of the giant radio galaxies, possessing an active galactic nucleus (AGN) and optically one of the most luminous galaxies in the sky. In 1949, NGC 5128 was found to be a loud source of radio energy, in fact the loudest radio source in its region of the sky (second overall to Cygnus A), earning it the designation Centarus A. As a radio galaxy it releases 1000 times the radio energy of the Milky Way in the form of large bi

Centaurus A elliptical galaxy (NGC 5128) in Centaurus - The radio galaxy Centaurus A (NGC 5128): The galaxy NGC 5128 is located about 13 million light years away from Earth in the southern constellation of Centaurus. A broad dark band crosses it in the middle, a probable vestige of a collision with a spiral galaxy. This giant galaxy is a powerful radio source known as Centaurus A. It is an active galaxy whose energy comes from a supermassive black hole. - NGC 5128 is the nearest large elliptical galaxies to our sun at about 13 million light years. It is also the nearest of the giant radio galaxies, possessing an active galactic nucleus (AGN) and optically one of the most luminous galaxies in the sky. In 1949, NGC 5128 was found to be a loud source of radio energy, in fact the loudest radio source in its region of the sky (second overall to Cygnus A), earning it the designation Centarus A. As a radio galaxy it releases 1000 times the radio energy of the Milky Way in the form of large bi

PIX4612309

Remains of Supernova N49 dans la Dorade/HST - Resembling the puffs of smoke and sparks from a summer fireworks display in this image from Nasa's Hubble Space Telescope, these delicate filaments are actually sheets of debris from a stellar explosion in a neighboring galaxy. Hubble's target was a supernova remnant within the Large Magellanic Cloud (LMC), a nearby, small companion galaxy to the Milky Way visible from the southern hemisphere. Denoted N 49, or DEM L 190, this remnant is from a massive star that died in a supernova blast whose light would have reached Earth thousands of years ago. This filamentary material will eventually be recycled into building new generations of stars in the LMC. Our own Sun and planets are constructed from similar debris of supernovae that exploded in the Milky Way billions of years ago. This seemingly gentle structure also harbors a very powerful spinning neutron star that may be the central remnant from the initial blast. It is quite common for the co

Remains of Supernova N49 dans la Dorade/HST - Resembling the puffs of smoke and sparks from a summer fireworks display in this image from Nasa's Hubble Space Telescope, these delicate filaments are actually sheets of debris from a stellar explosion in a neighboring galaxy. Hubble's target was a supernova remnant within the Large Magellanic Cloud (LMC), a nearby, small companion galaxy to the Milky Way visible from the southern hemisphere. Denoted N 49, or DEM L 190, this remnant is from a massive star that died in a supernova blast whose light would have reached Earth thousands of years ago. This filamentary material will eventually be recycled into building new generations of stars in the LMC. Our own Sun and planets are constructed from similar debris of supernovae that exploded in the Milky Way billions of years ago. This seemingly gentle structure also harbors a very powerful spinning neutron star that may be the central remnant from the initial blast. It is quite common for the co

PIX4582891

Planetary nebula NGC 6543 dans le Dragon/HST - The nebula, formally cataloged NGC 6543 was one of the first planetary nebulae to be discovered; it is one of the most complex such nebulae seen in space. A planetary nebula forms when Sun - like stars gently eject their outer gaseous layers that form bright nebulae with amazing and confounding shapes. In 1994, Hubble first revealed NGC 6543's surprisingly intricate structures, including concentric gas shells, jets of high - speed gas, and unusual shock - induced knots of gas. As if the Cat's Eye itself isn't spectacular enough, this new image taken with Hubble's Advanced Camera for Surveys (ACS) reveals the full beauty of a bull's eye pattern of eleven or even more concentric rings, or shells, around the Cat's Eye. Each 'ring' is actually the edge of a spherical bubble seen projected onto the sky - - that's why it appears bright along its outer edge. Observations suggest the star ejected its mass in a series of pulses at 1,500 - year inte

Planetary nebula NGC 6543 dans le Dragon/HST - The nebula, formally cataloged NGC 6543 was one of the first planetary nebulae to be discovered; it is one of the most complex such nebulae seen in space. A planetary nebula forms when Sun - like stars gently eject their outer gaseous layers that form bright nebulae with amazing and confounding shapes. In 1994, Hubble first revealed NGC 6543's surprisingly intricate structures, including concentric gas shells, jets of high - speed gas, and unusual shock - induced knots of gas. As if the Cat's Eye itself isn't spectacular enough, this new image taken with Hubble's Advanced Camera for Surveys (ACS) reveals the full beauty of a bull's eye pattern of eleven or even more concentric rings, or shells, around the Cat's Eye. Each 'ring' is actually the edge of a spherical bubble seen projected onto the sky - - that's why it appears bright along its outer edge. Observations suggest the star ejected its mass in a series of pulses at 1,500 - year inte

PIX4623222

Spiral Galaxy M66 in the Lion - Spiral galaxy M66 in Leo - M66 (NGC 3627) is a spiral galaxy located at a distance of about 35 million years - light. M66, with its neighbors M65 and NGC 3628, forms a remarkable triplet of galaxies, called the Lion Triplet or the M66 Group. Image obtained by the Hubble Space Telescope. The unusual spiral galaxy, Messier 66, is located at a distance of about 35 million light - years in the constellation of Leo. Together with Messier 65 and NGC 3628, Messier 66 is one third of the Leo Triplet, a trio of interacting spiral galaxies, part of the larger Messier 66 group. Messier 66 wins out in size over its fellow triplets - - it is about 100 000 light - years across. Messier 66 is the proud owner of exclusive asymmetric spiral arms which seem to climb above the galaxy's main disc and an apparently displaced nucleus. This asymmetry is unusual; most often, dense waves of gas, dust and newly born stars wind about the galaxy's centre in a symmetric way. Astrono

Spiral Galaxy M66 in the Lion - Spiral galaxy M66 in Leo - M66 (NGC 3627) is a spiral galaxy located at a distance of about 35 million years - light. M66, with its neighbors M65 and NGC 3628, forms a remarkable triplet of galaxies, called the Lion Triplet or the M66 Group. Image obtained by the Hubble Space Telescope. The unusual spiral galaxy, Messier 66, is located at a distance of about 35 million light - years in the constellation of Leo. Together with Messier 65 and NGC 3628, Messier 66 is one third of the Leo Triplet, a trio of interacting spiral galaxies, part of the larger Messier 66 group. Messier 66 wins out in size over its fellow triplets - - it is about 100 000 light - years across. Messier 66 is the proud owner of exclusive asymmetric spiral arms which seem to climb above the galaxy's main disc and an apparently displaced nucleus. This asymmetry is unusual; most often, dense waves of gas, dust and newly born stars wind about the galaxy's centre in a symmetric way. Astrono

PIX4610836

The evolution of stars - Illustration - The evolution of the stars - Illustration - All stars are born in interstellar clouds but according to their masses they will follow different destinies

The evolution of stars - Illustration - The evolution of the stars - Illustration - All stars are born in interstellar clouds but according to their masses they will follow different destinies

P. Carril

PIX4573016

Stellaria media/Bird's Walk/Morgeline/Intermediate Starfish/Common Chickweed

Stellaria media/Bird's Walk/Morgeline/Intermediate Starfish/Common Chickweed

Neveu P.

HFE4463009

George Wilhelm Steller, 18th century (engraving)

George Wilhelm Steller, 18th century (engraving)

UIG2603679

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