galaxies

The core of M33 (center) is the location of a huge cluster of stars born relatively recently — 70 or so million years ago. Credit: NASA, ESA, and M. Durbin, J. Dalcanton, and B.F. Williams (University of Washington)
T R I A N G U L U M
Phil Plait

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Astronomers accidentally discover a nearby galaxy in a Hubble image!
Phil Plait
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The tiny and faint dwarf galaxy Bedin I is almost hidden in the background among the much brighter stars in the globular cluster NGC 6752. Note several other far more distant galaxies can be seen, too.
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How is a galaxy like a road-tripping dog?
Phil Plait
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A close-up of D100 shows the streamer in silhouette, with the dust (along with the gas) leaving the galaxy blocking the light form stars behind it. Credit: NASA, ESA, M. Sun (University of Alabama), and W. Cramer and J. Kenney (Yale University)
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Pale, dusty dots
Phil Plait
Jan 11, 2019
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A map of the sky using the far-infrared observatory Herschel; every dot you see in this image is a distant galaxy. Credit: ESA/Herschel/SPIRE; M. W. L. Smith et al 2017
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Overlapping galaxies
Phil Plait
Jan 8, 2019
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Two overlapping galaxies, some 800 million light years away, were captured by Hubble accidentally while viewing a much closer galaxy (NGC 253, off screen to the right).
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Warp into a galaxy
Phil Plait
Dec 14, 2018
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NGC 5084, a lovely but odd disk galaxy with an obviously warped disk. Credit: Adam Block/Mount Lemmon SkyCenter/University of Arizona
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A cluster of clusters: The globulars of Coma
Phil Plait
Dec 10, 2018
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The inner part of the massive Coma galaxy cluster, where thousands of galaxies swarm. Credit: NASA, ESA, J. Mack (STScI), and J. Madrid (Australian Telescope National Facility)
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A distant black hole powers a colossal galactic fountain
Phil Plait
Nov 29, 2018
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Composite image of the galaxy cluster Abell 2597 showing X-rays from background hot gas (purple), radio waves from cold gas falling toward the center (yellow), and warm hydrogen gas (red).
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Beginnings
Phil Plait
Nov 28, 2018
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Distant galaxies pepper this deep infrared image of the sky, the first taken by Hubble after being reactivated after several weeks of being in safe mode due to a busted gyro. This image has been enlarged and slightly contrast-enhanced from original.
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Observing galaxy cluster collisions is quite the… enterprise
Phil Plait
Nov 20, 2018
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The colliding galaxy clusters Abell 1033. Optical light (red/green/blue) shows galaxies, X-rays (purple) super-hot gas, and radio (blue) much lower energy gas blown out from a galaxy.
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The Milky Way ate another galaxy, and we can still see the undigested bits
Phil Plait
Nov 6, 2018
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Artwork depicting the stars from Gaia-Enceladus (arrows indicate their velocity) merging with the Milky Way based on actual physical simulations.
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The Milky Way’s sibling spiral star system
Phil Plait
Oct 19, 2018
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The central region of the gorgeous spiral galaxy NGC 6744, imaged using the Hubble Space Telescope. Credit: NASA, ESA, and the LEGUS team
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A gigantic galactic city — still under construction — seen clear across the Universe
Phil Plait
Oct 18, 2018
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A visualization of the Hyperion proto-supercluster based on actual observations. Credit: ESO/L. Calçada & Olga Cucciati et al.
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Is this faint smear of a light a galaxy or the guts ripped out of a galaxy?
Phil Plait
Oct 4, 2018
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An image of the nearby Leo I galaxy group show several obvious galaxies, but also a faint smear of light (outlined) that may be a previously undiscovered galaxy. Credit: Mihos et al.
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WHAM! BULLSEYE! Galactic collision creates a ring of black holes and neutron stars
Phil Plait
Sep 10, 2018
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The ring galaxy AM 0644-071, created when a small compact galaxy plowed through the middle of a spiral galaxy at least tens of millions of years ago. Credit: NASA, ESA, and The Hubble Heritage Team (AURA/STScI)
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IC 4870, the mystery galaxy
Phil Plait
Sep 6, 2018
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The dwarf galaxy IC 4870 is lovely in this Hubble image, but more information about it is scarce. Credit: ESA/Hubble & NASA
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