1215 Supernova Remnant Cassiopeia A (Annotated)

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Credits: NASA and The Hubble Heritage Team (STScI/AURA)





2081 Hubble Catches Titan Chasing Its Shadow

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This movie still shows Titan chasing its shadow across Saturn's disk. The still is from a movie created from images taken by NASA's Hubble Space Telescope. It reveals the planet's rings tipped nearly edge-on toward the Earth. This edge-on alignment happens once every 15 years. The last time this alignment occurred was in 1995 and 1996. The images for the movie were taken Aug. 6, 1995 with Hubble's Wide Field and Planetary Camera 2, in blue, green, and red filters. This true-color image of Saturn shows the bands of clouds that make up the planet's atmosphere. This banded structure is similar to Jupiter's. A thick haze covers the clouds. The moon Tethys is just beneath Saturn's rings on the left. The "thumbnail" images on the far left are frames from the movie that show the moons transiting the planet.

Credits: NASA, ESA, and E. Karkoschka (University of Arizona)





908 Rotten Egg Nebula

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Color-mapped K-band (F205W)

Credits: NASA, ESA, William B. Latter (SIRTF Science Center/California Institute of Technology), John H. Bieging (University of Arizona), Casey Meakin (University of Arizona), A.G.G.M. Tielens (Kapteyn Astronomical Institute), Aditya Dayal (IPAC/NASA Jet Propulsion Laboratory), Joseph L. Hora (Center for Astrophysics), and Douglas M. Kelly (University of Arizona).





3883 Antennae Galaxies

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This celestial firestorm is the blazing wreckage of a collision between two spiral galaxies. The two galaxies, whose bright yellow cores appear to the lower left and upper right of center, began their fateful confrontation a few hundred million years ago. Formally known as NGC 4038 and NGC 4039, the pair is nicknamed the Antennae Galaxies because of two long streamers of stars, gas, and dust that extend from the crash site. Wide-field images reveal the elongated “antennae" formed during the initial impact, but this Hubble image concentrates on the heart of the galactic collision. The cosmic smashup has pulled dark dust into long strands stretching from one galaxy to the other. It has also compressed huge clouds of gas and dust, igniting a rash of new star formation within the galaxies. Clusters of young stars sparkle in blue, while pinkish star-forming nebulae are churning out even more stars. Astronomers estimate that billions of new stars will form as the two galaxies complete their collision and eventually merge into one galaxy. Hubble's view of the Antennae is the sharpest taken to date, allowing astronomers to study these galaxies and their newly forming star clusters in unprecedented detail. Using Hubble to investigate the Antennae, Brad Whitmore of the Space Telescope Science Institute and his colleagues found that the merging galaxies contain more than a thousand young "super star clusters." They believe many of these clusters will eventually disperse, but the largest ones will survive to become giant, spherical-shaped stellar groupings called globular clusters, like those that reside in the outskirts of our own galaxy. Most globular clusters contain ancient stars and were thought to be relics of a galaxy's earliest days, but Hubble's observations suggest that globular clusters can also be born more recently from galactic mergers. About 65 million light-years away, the Antennae Galaxies make up one of the closest pairs of colliding galaxies to us. Because many (if not all) present-day, large galaxies are thought to have grown from smaller galaxies that collided and merged, studying nearby collisions such as the Antennae Galaxies helps astronomers understand how galaxies evolved over the universe's history. It might even provide insight into our own spiral galaxy's future collision with the large, spiral Andromeda Galaxy. Constellation: Corvus Distance: 62 million light-years (19 Megaparsecs) Instrument: Advanced Camera for Surveys/WFC Image Filters: F435W (B), F550M (y), F658N (H-alpha+[N II]), F814W (I)

Credits: NASA, ESA, and the Hubble Heritage Team (STScI/AURA)-ESA/Hubble Collaboration; Acknowledgment: B. Whitmore (STScI)





1397 Warped, Edge-On Spiral Galaxy (Details from Image of NGC 3370)

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A Sombrero-galaxy-look-alike is seen edge on with a small warp in the middle right.

Credits: NASA, The Hubble Heritage Team and A. Riess (STScI)





789 Close-Up of Galaxy NGC 2903 in Infrared

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Credits: Credit: Torsten Boeker, Space Telescope Science Institute (STScI) , and NASA





4174 James Webb Space Telescope Rear View

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Webb's science instruments are housed behind the mirror, separated from the warm communications and control technology by the sunshield.

Credits: Northrop Grumman





1480 Ring Around Supernova 1987A (SN1987A) - February 2, 2000

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Credits: NASA, P. Challis, R. Kirshner (Harvard-Smithsonian Center for Astrophysics) and B. Sugerman (STScI)





3405 Atmospheric Spectra of Three Hot Jupiters Showing Water Absorption

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This graph compares observations with modeled infrared spectra of three hot-Jupiter-class exoplanets that were spectroscopically observed with the Hubble Space Telescope. The red curve in each case is the best-fit model spectrum for the detection of water vapor absorption in the planetary atmosphere. The blue circles and error bars show the processed and analyzed data from Hubble's spectroscopic observations.

Credits: NASA, ESA, N. Madhusudhan (University of Cambridge), and A. Feild and G. Bacon (STScI)





2326 Hubble Interacting Galaxy AM 0500-620

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AM 0500-620 consists of a highly symmetric spiral galaxy seen nearly face-on and partially backlit by a background galaxy. The foreground spiral galaxy has a number of dust lanes between its arms. The background galaxy was earlier classified as an elliptical galaxy, but Hubble has now revealed a galaxy with dusty spiral arms and bright knots of stars. AM0500-620 is 350 million light-years away from Earth in the constellation of Dorado, the Swordfish. This image is part of a large collection of 59 images of merging galaxies taken by the Hubble Space Telescope and released on the occasion of its 18th anniversary on 24th April 2008.

Credits: NASA, ESA, the Hubble Heritage (STScI/AURA)-ESA/Hubble Collaboration, and W. Keel (University of Alabama, Tuscaloosa)





209 Jupiter's Upper Atmospheric Winds in Ultraviolet Light

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Top – Three impact sites appear as dark smudges lined up along Jupiter's southern hemisphere (from left to right, sites C, A, and E). This pair of images was obtained on 17 July, several hours after the E impact. These 3 impact sites appear strikingly darker in the far-ultraviolet images to the right. This is because the smoke and dust rising from the fireballs absorbs UV light more strongly than violet light, so that the clouds appear both darker and larger in the UV images. Apparently, the fireball and plume threw large amounts of material completely above the atmosphere. This material diffused back down through the atmosphere with the smaller and lighter particles suspended at high altitudes. Bottom – Rubble's view of the same hemisphere of Jupiter 12-13 days later shows that the smoke and dust have now been spread mainly in the east/west direction by die prevailing winds at the altitude where the dark material is suspended or "floating" in the atmosphere. HST shows that winds in Jupiter's upper atmosphere carry the high altitude smoke and dust in different directions than in the lower atmosphere. For example, the UV image shows a fainter cloud near 45 deg. south latitude, which does not appear in the violet image. The fainter cloud may be due to high altitude material which is drifting with the upper atmospheric winds to the north away from the polar regions. However, in the left-hand impact regions the clouds being observed are lower in the atmosphere where there is apparently no such northerly wind. The violet images show the Great Red Spot, on the eastern (right) limb, one of Jupiter's moons crossing in front of the planet in the northern hemisphere (and its shadow on Jupiter's clouds on the left-hand side in the lower image), and the dark clouds above 3 of the impact sites near 45 deg. south latitude. In addition, Jupiter's polar aurora can also be seen in the far-ultraviolet images near both northern and southern poles. The images were taken with the Wide Field Planetary Camera 2.

Credits: J.T. Clarke, G.E. Ballester (University of Michigan), and J.T. Trauger (Jet Propulsion Laboratory), and NASA





2694 Close-up of Comet-like Asteroid P/2010 A2

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Credits: NASA, ESA, and D. Jewitt (UCLA)





2378 COSMOS Barred Spiral Galaxies

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These images show four spiral galaxies with bars of stars and gas slicing through them. The galaxies are at various distances from Earth. The galaxy at upper left is 2.1 billion light-years away; the galaxy at upper right, 3.8 billion light-years away; the galaxy at lower left, 5.3 billion light-years away; and the galaxy at lower right, 6.4 billion light-years away. The galaxies are part of a landmark study of more than 2,000 spiral galaxies from the largest galaxy census conducted by the Advanced Camera for Surveys aboard NASA's Hubble Space Telescope. The survey's results show that so-called barred spiral galaxies were far less plentiful over the last 7 billion years than they are today, in the local universe. The study's results confirm the idea that bars are a sign of galaxies reaching full maturity as the "formative years" end. The observations are part of the Cosmic Evolution Survey (COSMOS). COSMOS covers an area of sky nine times larger than the full Moon, surveying 10 times more spiral galaxies than previous observations. Astronomers assembled these images from observations taken with Hubble and the Subaru Telescope in Mauna Kea, Hawaii. The observations were taken between fall 2003 and spring 2005.

Credits: NASA, ESA, K. Sheth (Spitzer Science Center, California Institute of Technology, Pasadena, Calif.), and P. Capak and N. Scoville (California Institute of Technology)





1700 Supernova Remnant N 63A Menagerie

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A violent and chaotic-looking mass of gas and dust is seen in this Hubble Space Telescope image of a nearby supernova remnant. Denoted N 63A, the object is the remains of a massive star that exploded, spewing its gaseous layers out into an already turbulent region. The supernova remnant is a member of N 63, a star-forming region in the Large Magellanic Cloud (LMC). Visible from the southern hemisphere, the LMC is an irregular galaxy lying 160,000 light-years from our own Milky Way galaxy. The LMC provides excellent examples of active star formation and supernova remnants to be studied with Hubble. Many of the stars in the immediate vicinity of N 63A are extremely massive. It is estimated that the progenitor of the supernova that produced the remnant seen here was about 50 times more massive than our own Sun. Such a massive star has strong stellar winds that can clear away its ambient medium, forming a wind-blown bubble. The supernova that formed N 63A is thought to have exploded inside the central cavity of such a wind-blown bubble, which was itself embedded in a clumpy portion of the LMC's interstellar medium. Images in the infrared, X-ray, and radio emission of this supernova remnant show the much more expanded bubble that totally encompasses the optical emission seen by Hubble. Odd-shaped mini-clouds or cloudlets that were too dense for the stellar wind to clear away are now engulfed in the bubble interior. The supernova generated a propagating shock wave, that continues to move rapidly through the low-density bubble interior, and shocks these cloudlets, shredding them fiercely. Supernova remnants have long been thought to set off episodes of star formation when their expanding shock encounters nearby gas. As the Hubble images have illustrated, N 63A is still young and its ruthless shocks destroy the ambient gas clouds, rather than coercing them to collapse and form stars. Data obtained at various wavelengths from other detectors reveal on-going formation of stars at 10 to 15 light-years from N 63A. In a few million years, the supernova ejecta from N 63A would reach this star-formation site and may be incorporated into the formation of planets around solar-type stars there, much like the early history of the solar system. The Hubble image of N 63A is a color representation of data taken in 1997 and 2000 with Hubble's Wide Field Planetary Camera 2. Color filters were used to sample light emitted by sulfur (shown in red), oxygen (shown in blue), and hydrogen (shown in green).

Credits: NASA, ESA, HEIC, and The Hubble Heritage Team (STScI/AURA); Acknowledgment: Y.-H. Chu and R. M. Williams (UIUC)





2509 Annotated Image of Saturn's Rings and Moons

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Credits: Illustration: NASA, ESA, and Z. Levay (STScI); Image: NASA, ESA, and the Hubble Heritage Team (STScI/AURA); Acknowledgment: M.H. Wong (STScI/UC Berkeley) and C. Go (Philippines)





4070 Compass Image for Comet C/2017 K2

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Credits: NASA, ESA, and D. Jewitt (UCLA)





2832 Swift Images of GRB 110328A

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Images from Swift's Ultraviolet/Optical (in white and purple) and X-ray telescopes (in yellow and red) were combined in this view of GRB 110328A. The blast was detected only in X-rays, which were collected over a 3.4-hour period on March 28, 2011.

Credits: NASA, Swift, and S. Immler (NASA GSFC)





2019 unnamed

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539 Ground-Based Image of M87

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Digitized Sky Survey Image of the active elliptical galaxy M87.

Credits: Credit: Digitized Sky Survey (AURA, Inc.)





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