galaxies

Stars in some of the stellar streams recently discovered using Gaia data superposed on a map of the galaxy. Credit: ESA/Gaia/DPAC
Gaia: The sky is littered with undigested galaxies
Phil Plait

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For the first time, astronomers see the birth of a neutron star binary system
Phil Plait
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Artwork showing the moment of the neutron star collision, with beams of energy shooting out and gravitational waves shaking ripples in the space-time continuum. Credit: NSF/LIGO/Sonoma State University/A. Simonnet
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Astronomers spot a massive doughnut of material around quasar Cygnus A’s supermassive black hole
Phil Plait
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Cygnus A
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Facing the incomprehensible beauty of M 61
Phil Plait
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The spectacular spiral galaxy M61, observed by the 8.2-meter Very Large Telescope. Credit: ESO
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The staggering beauty of galactic collisions
Phil Plait
Mar 12, 2019
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A closer look at the center of NGC 3256 reveals the chaos there, struggling to recover order. Dark dust clouds and bright stars may yet retain their overall spiral distribution. Credit: ESA/Hubble, NASA
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Prelude to galactic catastrophe
Phil Plait
Feb 22, 2019
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NGC 6769 (right) and 6770 (left) are two spiral galaxies on their way to a massive collision. Credit: NASA/ESA/ESO/Judy Schmidt
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T R I A N G U L U M
Phil Plait
Feb 4, 2019
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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)
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Astronomers accidentally discover a nearby galaxy in a Hubble image!
Phil Plait
Feb 1, 2019
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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
Jan 30, 2019
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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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