|
|
Fire Within the Antennae Gal
…
| Title |
Fire Within the Antennae Galaxies |
| Description |
This false-color image from NASA's Spitzer Space Telescope reveals hidden populations of newborn stars at the heart of the colliding "Antennae" galaxies. These two galaxies, known individually as NGC 4038 and 4039, are located around 68 million light-years away and have been merging together for about the last 800 million years. The latest Spitzer observations provide a snapshot of the tremendous burst of star formation triggered in the process of this collision, particularly at the site where the two galaxies overlap. The main image is a false-color composite of infrared data from Spitzer and visible-light data from Kitt Peak National Observatory, Tucson, Ariz. Visible light from stars in the galaxies (blue and green) is shown together with infrared light from warm dust clouds heated by newborn stars (red). The two nuclei, or centers, of the merging galaxies show up as yellow-white areas, one above the other. The brightest clouds of forming stars lie in the overlap region between and left of the nuclei. The upper right panel shows the Spitzer image by itself. This picture was taken by the infrared array camera and is a combination of infrared light ranging from 3.6 microns (shown in blue) to 8.0 microns (shown in red). The dust emission (red) is by far the strongest feature in this image. Starlight was systematically subtracted from the longer wavelength data (red) to enhance dust features. The lower right panel shows the true-color, visible-light image by itself. Here, we find a strikingly different view, with the bright star-forming features seen in the Spitzer image buried within dark clouds of dust. Throughout the sky, astronomers have identified many of these so-called "interacting" galaxies, whose spiral discs have been stretched and distorted by their mutual gravity as they pass close to one another. The distances involved are so large that the interactions evolve on timescales comparable to geologic changes on Earth. Observations of such galaxies, combined with computer models of these collisions, show that the galaxies often become forever bound to one another, eventually merging into a single, spheroidal-shaped galaxy. In the Spitzer image, wavelengths of 3.6 microns are represented in blue, 4.5 microns in green and 5.8-8.0 microns in red. In the composite image, wavelengths of .44 microns are represented in blue, .70 microns in green and 8.0 microns in red. The Spitzer image was taken on Dec. 24, 2003. |
|
Fire Within the Antennae Gal
…
| Title |
Fire Within the Antennae Galaxies |
| Description |
This false-color image from NASA's Spitzer Space Telescope reveals hidden populations of newborn stars at the heart of the colliding "Antennae" galaxies. These two galaxies, known individually as NGC 4038 and 4039, are located around 68 million light-years away and have been merging together for about the last 800 million years. The latest Spitzer observations provide a snapshot of the tremendous burst of star formation triggered in the process of this collision, particularly at the site where the two galaxies overlap. The main image is a false-color composite of infrared data from Spitzer and visible-light data from Kitt Peak National Observatory, Tucson, Ariz. Visible light from stars in the galaxies (blue and green) is shown together with infrared light from warm dust clouds heated by newborn stars (red). The two nuclei, or centers, of the merging galaxies show up as yellow-white areas, one above the other. The brightest clouds of forming stars lie in the overlap region between and left of the nuclei. The upper right panel shows the Spitzer image by itself. This picture was taken by the infrared array camera and is a combination of infrared light ranging from 3.6 microns (shown in blue) to 8.0 microns (shown in red). The dust emission (red) is by far the strongest feature in this image. Starlight was systematically subtracted from the longer wavelength data (red) to enhance dust features. The lower right panel shows the true-color, visible-light image by itself. Here, we find a strikingly different view, with the bright star-forming features seen in the Spitzer image buried within dark clouds of dust. Throughout the sky, astronomers have identified many of these so-called "interacting" galaxies, whose spiral discs have been stretched and distorted by their mutual gravity as they pass close to one another. The distances involved are so large that the interactions evolve on timescales comparable to geologic changes on Earth. Observations of such galaxies, combined with computer models of these collisions, show that the galaxies often become forever bound to one another, eventually merging into a single, spheroidal-shaped galaxy. In the Spitzer image, wavelengths of 3.6 microns are represented in blue, 4.5 microns in green and 5.8-8.0 microns in red. In the composite image, wavelengths of .44 microns are represented in blue, .70 microns in green and 8.0 microns in red. The Spitzer image was taken on Dec. 24, 2003. |
|
Fire Within the Antennae Gal
…
| Title |
Fire Within the Antennae Galaxies |
| Description |
This false-color image from NASA's Spitzer Space Telescope reveals hidden populations of newborn stars at the heart of the colliding "Antennae" galaxies. These two galaxies, known individually as NGC 4038 and 4039, are located around 68 million light-years away and have been merging together for about the last 800 million years. The latest Spitzer observations provide a snapshot of the tremendous burst of star formation triggered in the process of this collision, particularly at the site where the two galaxies overlap. The main image is a false-color composite of infrared data from Spitzer and visible-light data from Kitt Peak National Observatory, Tucson, Ariz. Visible light from stars in the galaxies (blue and green) is shown together with infrared light from warm dust clouds heated by newborn stars (red). The two nuclei, or centers, of the merging galaxies show up as yellow-white areas, one above the other. The brightest clouds of forming stars lie in the overlap region between and left of the nuclei. The upper right panel shows the Spitzer image by itself. This picture was taken by the infrared array camera and is a combination of infrared light ranging from 3.6 microns (shown in blue) to 8.0 microns (shown in red). The dust emission (red) is by far the strongest feature in this image. Starlight was systematically subtracted from the longer wavelength data (red) to enhance dust features. The lower right panel shows the true-color, visible-light image by itself. Here, we find a strikingly different view, with the bright star-forming features seen in the Spitzer image buried within dark clouds of dust. Throughout the sky, astronomers have identified many of these so-called "interacting" galaxies, whose spiral discs have been stretched and distorted by their mutual gravity as they pass close to one another. The distances involved are so large that the interactions evolve on timescales comparable to geologic changes on Earth. Observations of such galaxies, combined with computer models of these collisions, show that the galaxies often become forever bound to one another, eventually merging into a single, spheroidal-shaped galaxy. In the Spitzer image, wavelengths of 3.6 microns are represented in blue, 4.5 microns in green and 5.8-8.0 microns in red. In the composite image, wavelengths of .44 microns are represented in blue, .70 microns in green and 8.0 microns in red. The Spitzer image was taken on Dec. 24, 2003. |
|
Fire Within the Antennae Gal
…
| Title |
Fire Within the Antennae Galaxies |
| Description |
This false-color image from NASA's Spitzer Space Telescope reveals hidden populations of newborn stars at the heart of the colliding "Antennae" galaxies. These two galaxies, known individually as NGC 4038 and 4039, are located around 68 million light-years away and have been merging together for about the last 800 million years. The latest Spitzer observations provide a snapshot of the tremendous burst of star formation triggered in the process of this collision, particularly at the site where the two galaxies overlap. The main image is a false-color composite of infrared data from Spitzer and visible-light data from Kitt Peak National Observatory, Tucson, Ariz. Visible light from stars in the galaxies (blue and green) is shown together with infrared light from warm dust clouds heated by newborn stars (red). The two nuclei, or centers, of the merging galaxies show up as yellow-white areas, one above the other. The brightest clouds of forming stars lie in the overlap region between and left of the nuclei. The upper right panel shows the Spitzer image by itself. This picture was taken by the infrared array camera and is a combination of infrared light ranging from 3.6 microns (shown in blue) to 8.0 microns (shown in red). The dust emission (red) is by far the strongest feature in this image. Starlight was systematically subtracted from the longer wavelength data (red) to enhance dust features. The lower right panel shows the true-color, visible-light image by itself. Here, we find a strikingly different view, with the bright star-forming features seen in the Spitzer image buried within dark clouds of dust. Throughout the sky, astronomers have identified many of these so-called "interacting" galaxies, whose spiral discs have been stretched and distorted by their mutual gravity as they pass close to one another. The distances involved are so large that the interactions evolve on timescales comparable to geologic changes on Earth. Observations of such galaxies, combined with computer models of these collisions, show that the galaxies often become forever bound to one another, eventually merging into a single, spheroidal-shaped galaxy. In the Spitzer image, wavelengths of 3.6 microns are represented in blue, 4.5 microns in green and 5.8-8.0 microns in red. In the composite image, wavelengths of .44 microns are represented in blue, .70 microns in green and 8.0 microns in red. The Spitzer image was taken on Dec. 24, 2003. |
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Chandra Image of Diffuse Emi
…
| Name |
Chandra Image of Diffuse Emission |
|
Spectrum of Region in Antenn
…
| Name |
Spectrum of Region in Antennae |
|
Animation of Colliding Galax
…
| Name |
Animation of Colliding Galaxies |
|
Hubble Reveals Stellar Firew
…
| Title |
Hubble Reveals Stellar Fireworks Accompanying Galaxy Collisions |
| General Information |
What is a Space Science Update? Major Hubble discoveries on NASA television ... Astronomers explain their Hubble discoveries at a press conference, called a Space Science Update (SSU), broadcast on NASA television. The SSU includes a question and answer session with members of the media. The Hubble telescope has uncovered over 1,000 bright, young star clusters bursting to life in a brief, intense, brilliant "fireworks show" at the heart of a pair of colliding galaxies. The picture on the left provides a sweeping view of the two galaxies, called the Antennae. The green shape pinpoints Hubble's view. Hubble's close-up view [right] provides a detailed look at the "fireworks" at the center of this wreck. The respective cores of the twin galaxies are the orange blobs, left and right of center, crisscrossed by filaments of dark dust. A wide band of chaotic dust stretches between the cores of the two galaxies. The sweeping spiral-like patterns, traced by bright blue star clusters, are the result of a firestorm of star birth that was triggered by the collision. Read more: * Release Text [ http://hubblesite.org/newscenter/archive/releases/1997/34/text/ ] |
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Mars May Be Cozy Place for H
…
| Title |
Mars May Be Cozy Place for Hardy Microbes |
|
Super Star Clusters in the A
…
| Title |
Super Star Clusters in the Antennae Galaxies |
| General Information |
What is Hubble Heritage? A monthly showcase of new and archival Hubble images. Go to the Heritage site. This new NASA Hubble Space Telescope image of the Antennae galaxies is the sharpest yet of this merging pair of galaxies. During the course of the collision, billions of stars will be formed. The brightest and most compact of these star birth regions are called super star clusters. The new image allows astronomers to better distinguish between the stars and super star clusters created in the collision of two spiral galaxies. |
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Super Star Clusters in the A
…
| Title |
Super Star Clusters in the Antennae Galaxies |
| General Information |
What is Hubble Heritage? A monthly showcase of new and archival Hubble images. Go to the Heritage site. This new NASA Hubble Space Telescope image of the Antennae galaxies is the sharpest yet of this merging pair of galaxies. During the course of the collision, billions of stars will be formed. The brightest and most compact of these star birth regions are called super star clusters. The new image allows astronomers to better distinguish between the stars and super star clusters created in the collision of two spiral galaxies. |
|
Super Star Clusters in the A
…
| Title |
Super Star Clusters in the Antennae Galaxies |
| General Information |
What is Hubble Heritage? A monthly showcase of new and archival Hubble images. Go to the Heritage site. This new NASA Hubble Space Telescope image of the Antennae galaxies is the sharpest yet of this merging pair of galaxies. During the course of the collision, billions of stars will be formed. The brightest and most compact of these star birth regions are called super star clusters. The new image allows astronomers to better distinguish between the stars and super star clusters created in the collision of two spiral galaxies. |
|
Mars May Be Cozy Place for H
…
| Title |
Mars May Be Cozy Place for Hardy Microbes |
|
Mars May Be Cozy Place for H
…
| Title |
Mars May Be Cozy Place for Hardy Microbes |
|
Collision of Anternae Centra
…
| Name of Image |
Collision of Anternae Central Regions Observed by Chandra |
| Date of Image |
1999-12-01 |
| Full Description |
This Chandra image shows the central regions of two colliding galaxies known collectively as the Antennae (NGC-4038/4039). The Chandra image reveals a large population of extremely bright x-ray sources in this area of intense star formation. These x-ray sources, which emit 10 to several hundred times more x-ray power than similar sources in our own galaxy, are believed to be either massive black holes, or black holes that are beaming their energy toward Earth. In this x-ray image, red represents the low energy band, green intermediate, and blue the highest observed energies. The white and yellow sources are those that emit significant amounts of both low and high energy x-rays. About 60 million light years from Earth in the constellation Corvus, the Antennae Galaxies got their nickname from the wispy anntennae-like streams of gas as seen by optical telescopes. These ongoing wisps are believed to have been produced approximately 100 million years ago by the collision between the gala |
|
Collision of Anternae Centra
…
| Name of Image |
Collision of Anternae Central Regions Observed by Chandra |
| Date of Image |
1999-12-01 |
| Full Description |
This Chandra image shows the central regions of two colliding galaxies known collectively as the Antennae (NGC-4038/4039). The dozens of bright pointy-like sources are neutron stars or black holes pulling gas off nearby stars. The bright fuzzy patches are multimillion degree gas superbubbles, thousands of light years in diameter that were produced by the accumulated power of thousands of supernovae. The remaining glow of x-ray emission could be due to many faint x-ray sources or to clouds of hot gas in the galaxies. About 60 million light years from Earth in the constellation Corvus, the Antennae Galaxies got their nickname from the wispy anntennae-like streams of gas as seen by optical telescopes. These ongoing wisps are believed to have been produced approximately 100 million years ago by the collision between the galaxies. Although it is rare for stars to hit each other during a galactic collision, clouds of dust and gas do collide. Compression of these clouds can lead to the rebirth of millions of stars, and a few million years later, to thousands of supernovae. |
|
X-Rays From Antennae Galaxie
…
| Title |
X-Rays From Antennae Galaxies |
| Explanation |
A bevy [ http://www.ojohaven.com/collectives/ ] of black holes [ http://chandra.harvard.edu/xray_sources/black_holes.html ] and neutron stars [ http://astroe.gsfc.nasa.gov/docs/objects/ binaries/neutron_star_structure.html ] shine as bright, point-like sources against bubbles [ http://antwrp.gsfc.nasa.gov/apod/ap991130.html ] of million degree gas in this false-color x-ray image [ http://chandra.harvard.edu/press/00_releases/ press_081600.html ] from the orbiting Chandra Observatory [ http://chandra.harvard.edu/ index.html ]. The striking picture shows the central regions of two galaxies, NGC 4038 and NGC 4039, locked in a titanic collision some 60 million light-years distant in the constellation Corvus [ http://www.astro.wisc.edu/~dolan/constellations/constellations/ Corvus.html ]. In visible light images [ http://oposite.stsci.edu/pubinfo/PR/97/34/addtlim.html ], long, luminous, tendril-like structures emanating from the wreckage lend the pair their popular moniker, the Antennae Galaxies [ http://antwrp.gsfc.nasa.gov/apod/ap971022.html ]. Galactic collisions are now thought to be fairly common, but when they happen individual stars rarely collide. Instead gas and dust clouds merge and compress, triggering furious bursts of massive star formation [ http://oposite.stsci.edu/pubinfo/PR/97/34/b.html ] with thousands of resulting supernovae. The exploding stars litter the scene with bubbles [ http://adsabs.harvard.edu/cgi-bin/ nph-bib_query?bibcode=1999A%26A...350..230K ] of shocked hot gas and collapsed stellar cores [ http://observe.ivv.nasa.gov/nasa/space/stellardeath/ stellardeath_opening.html ]. Transfixed by this cosmic accident [ http://antwrp.gsfc.nasa.gov/apod/ap981219.html ] astronomers watch and are beginning to appreciate [ http://oposite.stsci.edu/pubinfo/PR/97/34/af3.html ] the collision-driven evolution of galaxies [ http://antwrp.gsfc.nasa.gov/apod/ap980216.html ], not unlike our own [ http://oposite.stsci.edu/pubinfo/PR/97/34/af1.html ]. |
|
The Antennae Galaxies in Col
…
| Title |
The Antennae Galaxies in Collision |
| Explanation |
Two galaxies are squaring off in Corvus [ http://chandra.harvard.edu/photo/constellations/corvus.html ] and here are the latest pictures [ http://heritage.stsci.edu/2006/46/index.html ]. When two galaxies collide [ http://curious.astro.cornell.edu/question.php?number=351 ], however, the stars that compose them usually do not. This is because galaxies are mostly empty space and, however bright, stars only take up only a small amount of that space. During the slow, hundred million year collision [ http://antwrp.gsfc.nasa.gov/apod/ap060630.html ], however, one galaxy can rip the other apart gravitationally, and dust [ http://antwrp.gsfc.nasa.gov/apod/ap030706.html ] and gas [ http://antwrp.gsfc.nasa.gov/apod/ap020129.html ] common to both galaxies does collide. In the above clash [ http://hubblesite.org/newscenter/newsdesk/archive/releases/2006/46/ ] of the titans [ http://en.wikipedia.org/wiki/Titans ], dark dust pillars [ http://antwrp.gsfc.nasa.gov/apod/ap050424.html ] mark massive molecular clouds [ http://antwrp.gsfc.nasa.gov/apod/ap060409.html ] are being compressed during the galactic encounter [ http://antwrp.gsfc.nasa.gov/apod/ap001102.html ], causing the rapid birth of millions of stars, some of which are gravitationally bound together in massive star clusters [ http://antwrp.gsfc.nasa.gov/apod/ap021229.html ]. |
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Antennae Galaxies in Near-In
…
| Title |
Antennae Galaxies in Near-Infrared |
| Explanation |
What happens when galaxies collide [ http://csep10.phys.utk.edu/astr162/lect/galaxies/ colliding.html ]? One of the best studied examples [ http://www.cv.nrao.edu/~jhibbard/n4038/n4038.html ] of the jumble of star clusters, gas, and dust clouds produced by such a cosmic train wreck [ http://www.npaci.edu/online/v4.9/ galaxies2.html ] is the interacting galaxy pair NGC 4038 / NGC 4039, the Antennae Galaxies [ http://antwrp.gsfc.nasa.gov/apod/ap971022.html ], only sixty million light-years away. In visible light images, long, luminous tendrils of material seem to reach out from the galactic wreckage [ http://www.cita.utoronto.ca/~dubinski/ antennae/antennae.html ], lending the entwined pair an insect-like appearance. But this penetrating view from the new Wide-field InfraRed Camera (WIRC [ http://astrosun.tn.cornell.edu/faculty/eiken/Projects/ WIRCstuff/wirc_performance.htm ]) attached to the Palomar Observatory's [ http://www.astro.caltech.edu/observatories/palomar/ overview.html ] 200 inch Hale telescope shows, in false-color, details of some otherwise hidden features. The large central nuclei of the two original galaxies dominate the near-infrared scene speckled with other bright sources which are themselves giant, newly formed star clusters [ http://astron.berkeley.edu/~agilbert/sscs/ antennae/ ]. Remarkably the northern (topmost) nucleus, obscured in optical images, is also revealed here to have a barred, mini-spiral structure reminiscent [ http://antwrp.gsfc.nasa.gov/apod/ap001004.html ] of many "single" spiral galaxies. |
|
X-Rays From Antennae Galaxie
…
| Title |
X-Rays From Antennae Galaxies |
| Explanation |
A bevy [ http://www.ojohaven.com/collectives/ ] of black holes [ http://chandra.harvard.edu/xray_sources/ blackholes_stellar.html ] and neutron stars [ http://astroe.gsfc.nasa.gov/docs/objects/ binaries/neutron_star_structure.html ] shine as bright, point-like sources against bubbles [ http://antwrp.gsfc.nasa.gov/apod/ap991130.html ] of million degree gas in this false-color x-ray image [ http://chandra.harvard.edu/photo/2004/antennae/ ] from the orbiting Chandra Observatory [ http://chandra.harvard.edu/ index.html ]. The striking picture spans about 80 thousand light-years across the central regions of two galaxies, NGC 4038 and NGC 4039, locked in a titanic collision some 60 million light-years away in the constellation Corvus [ http://chandra.harvard.edu/photo/2004/antennae/ animations.html ]. In visible light images [ http://hubblesite.org/newscenter/newsdesk/archive/releases/ 1997/34/image/p ], long, luminous, tendril-like structures emanating from the wreckage lend the pair their popular moniker, the Antennae Galaxies [ http://antwrp.gsfc.nasa.gov/apod/ap020411.html ]. Galactic collisions are now thought to be fairly common [ http://antwrp.gsfc.nasa.gov/apod/ap030812.html ], but when they happen individual stars rarely collide. Instead gas and dust clouds merge and compress, triggering furious bursts of massive star formation [ http://antwrp.gsfc.nasa.gov/apod/ap040202.html ] with thousands of resulting supernovae. The exploding stars litter the scene with bubbles of shocked gas enriched in heavy elements [ http://arxiv.org/abs/astro-ph/0401241 ], and collapsed stellar cores. Transfixed by this cosmic accident [ http://antwrp.gsfc.nasa.gov/apod/ap981219.html ] astronomers watch and are beginning to appreciate the collision-driven evolution [ http://chandra.harvard.edu/photo/2004/antennae/ animations.html ] of galaxies, not unlike our own. |
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The Antennae Galaxies B. Whi
…
| Title |
The Antennae Galaxies B. Whitmore (STScI [ http://www.stsci.edu ]), F. Schweizer (DTM [ http://www.ciw.edu/DTM.html ]), NASA [ http://www.nasa.gov/ ] |
| Explanation |
A ground-based telescopic view (left) of the collision between the galaxies NGC4038 [ http://antwrp.gsfc.nasa.gov/apod/ap970602.html ] and NGC4039 [ http://antwrp.gsfc.nasa.gov/apod/ap970506.html ] reveals long arcing insect-like "antennae" of luminous matter flung from the scene of the accident [ http://antwrp.gsfc.nasa.gov/apod/ap970223.html ]. Investigators using the Hubble Space Telescope [ http://oposite.stsci.edu/pubinfo/PR/97/34/ ] to sift through the cosmic wreckage near the two galaxy cores have recently announced the discovery [ http://oposite.stsci.edu/pubinfo/PR/97/34/pr.html ] of over a thousand bright young clusters of stars [ http://oposite.stsci.edu/pubinfo/PR/97/34/a.html ] - the result of a burst of star formation triggered by the collision [ http://oposite.stsci.edu/pubinfo/PR/97/34/anim.html ]. The green outline shows the area covered by the higher resolution Hubble image (right). At the distance of the Antennae galaxies (about 63 million [ http://antwrp.gsfc.nasa.gov/apod/ap971012.html ] light-years), a pixel in this image corresponds to about 15 light-years. Dust clouds around the two galactic nuclei [ http://oposite.stsci.edu/pubinfo/PR/97/34/b.html ] give them a dimmed and reddened appearance while the massive, hot, young stars of the newly formed clusters are blue. How do colliding galaxies evolve with time? Determining the ages of star clusters [ http://oposite.stsci.edu/pubinfo/PR/97/34/af4.html ] formed in galaxy collisions can provide significant clues. The Antennae galaxies are seen in the southerly constellation Corvus [ http://www.astro.wisc.edu/~dolan/constellations/ constellations/Corvus.html ]. |
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Fire within the Antennae Gal
…
PIA06854
Infrared Array Camera (IRAC)
| Title |
Fire within the Antennae Galaxies |
| Original Caption Released with Image |
This false-color image composite from NASA's Spitzer Space Telescope reveals hidden populations of newborn stars at the heart of the colliding "Antennae" galaxies. These two galaxies, known individually as NGC 4038 and 4039, are located around 68 million light-years away and have been merging together for about the last 800 million years. The latest Spitzer observations provide a snapshot of the tremendous burst of star formation triggered in the process of this collision, particularly at the site where the two galaxies overlap. The image is a composite of infrared data from Spitzer and visible-light data from Kitt Peak National Observatory, Tucson, Ariz. Visible light from stars in the galaxies (blue and green) is shown together with infrared light from warm dust clouds heated by newborn stars (red). The two nuclei, or centers, of the merging galaxies show up as yellow-white areas, one above the other. The brightest clouds of forming stars lie in the overlap region between and left of the nuclei. Throughout the sky, astronomers have identified many of these so-called "interacting" galaxies, whose spiral discs have been stretched and distorted by their mutual gravity as they pass close to one another. The distances involved are so large that the interactions evolve on timescales comparable to geologic changes on Earth. Observations of such galaxies, combined with computer models of these collisions, show that the galaxies often become forever bound to one another, eventually merging into a single, spheroidal-shaped galaxy. Wavelengths of 0.44 microns are represented in blue, .70 microns in green and 8.0 microns in red. This image was taken on Dec. 24, 2003. |
|
|
![The Antennae Galaxies B. Whitmore (STScI [ http://www.stsci.edu ]), F. Schweizer (DTM [ http://www.ciw.edu/DTM.html ]), NASA [ http://www.nasa.gov/ ]](http://mm04.nasaimages.org/MediaManager/srvr?mediafile=/Size1/NVA2-4-NA/8403/antennae_hst_big.jpg&userid=1&username=admin&resolution=1&servertype=JVA&cid=4&iid=NVA2&vcid=NA&usergroup=NASA_Astronomy_Picture_of_the_Day_Collecti-4-Admin&profileid=16)
