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Latest Interacting galaxy Stories

Image 1 - Collisions Not Needed For Star Formation
2011-09-13 09:46:39

  ESA's Herschel infrared space observatory has discovered that galaxies do not need to collide with each other to drive vigorous star birth. The finding overturns this long-held assumption and paints a more stately picture of how galaxies evolve. The conclusion is based on Herschel's observations of two patches of sky, each about a third of the size of the full Moon. It's like looking through a keyhole across the Universe — Herschel has seen more than a thousand galaxies...

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2011-07-02 07:07:57

Galaxies once thought of as voracious tigers are more like grazing cows, according to a new study using NASA's Spitzer Space Telescope. Astronomers have discovered that galaxies in the distant, early universe continuously ingested their star-making fuel over long periods of time. This goes against previous theories that the galaxies devoured their fuel in quick bursts after run-ins with other galaxies. "Our study shows the merging of massive galaxies was not the dominant method of galaxy...

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2011-01-13 14:57:51

By Robert Sanders, UC Berkeley Analysis method can locate satellite galaxies based on the ripples they create in the hydrogen gas Planet X, an often-sought 10th planet, is so far a no-show, but Sukanya Chakrabarti has high hopes for finding what might be called Galaxy X "“ a dwarf galaxy that she predicts orbits our Milky Way Galaxy. Many large galaxies, such as the Milky Way, are thought to have lots of satellite galaxies too dim to see. They are dominated by "dark matter," which...

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2010-09-29 13:25:00

The Magellanic Stream is an arc of hydrogen gas spanning more than 100 degrees of the sky as it trails behind the Milky Way's neighbor galaxies, the Large and Small Magellanic Clouds. Our home galaxy, the Milky Way, has long been thought to be the dominant gravitational force in forming the Stream by pulling gas from the Clouds. A new computer simulation by Gurtina Besla (Harvard-Smithsonian Center for Astrophysics) and her colleagues now shows, however, that the Magellanic Stream resulted...

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2010-06-30 06:25:00

Many of the Milky Way's ancient stars are remnants of other smaller galaxies torn apart by violent galactic collisions around five billion years ago, according to researchers at Durham University, who publish their results in a new paper in the journal Monthly Notices of the Royal Astronomical Society. Scientists at Durham's Institute for Computational Cosmology and their collaborators at the Max Planck Institute for Astrophysics, in Germany, and Groningen University, in Holland, ran huge...

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2009-11-25 13:37:38

Astronomers on behalf of Galaxy Zoo have unveiled a new game aimed at letting players help them understand how galaxies have formed. The game involves images taken by a camera attached to a telescope in the Sloan Digital Sky Survey. Game participants are asked to match simulations of colliding galaxies, called galactic mergers. Astronomers say the human brain is much more reliable than even the fastest computer at classifying the shapes of colliding galaxies. The project is led by scientists...

2008-11-24 16:17:40

Violent intergalactic collision created the bright pinwheels and broad star sweeps typical in disk galaxies such as the Milky Way, U.S. researchers found. The multiinstitutional team's simulated galaxy formation suggests disk galaxies likely began as flat, centralized star clusters, the University of Pittsburgh, one of the institutions, said in a news release. Smaller galaxies ripped through these disks billions of years ago, casting disk stars outward into the galaxies' current shapes, their...

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2008-10-07 11:49:00

Astronomers studying new images of a nearby galaxy cluster have found evidence that high-speed collisions between large elliptical galaxies may prevent new stars from forming, according to a paper to be published in a November 2008 issue of The Astrophysical Journal Letters. Led by Jeffrey Kenney, professor and chair of astronomy at Yale, the team saw a spectacular complex of warm gas filaments 400,000 light-years-long connecting the elliptical galaxy M86 and the spiral galaxy NGC 4438 in the...

2008-08-13 18:00:09

By Luntz, Stephen The Milky Way has been dubbed a galactic cannibal before (AS, September 1998, p.5), but new evidence is making it look like a stellar Hannibal Lecter. The latest reports of the Milky Way's consumption of the Sagittarius Elliptical Dwarf Galaxy, observed by astronomers from the Australian National University, follow observations of the effects of our galaxy's gravity on the Magellenic clouds (AS, April 2008, p.43). "The Sagittarius dwarf is a cosmic lightweight weighing...

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2008-01-10 08:15:00

AUSTIN, Texas -- We all start to party less around middle age, and new studies by a team led by University of Texas at Austin astronomer Shardha Jogee now finds that the universe, as a whole, is no exception. Jogee discussed her results today at a news conference at the 211th meeting of the American Astronomical Society. According to the current models of galaxy formation, dubbed "hierarchical lambda cold dark matter" models, galaxies built up to their current masses, shapes, and sizes...


Latest Interacting galaxy Reference Libraries

3_58ff37da55cb04f6a1661bcab5adea542
2004-10-19 04:45:40

Seyfert's Sextet -- Seyfert's Sextet is a group of galaxies in which gravitational forces are exerted between its members. The galaxies are so tightly packed together that gravitational forces are beginning to rip stars from them and distort their shapes. Those same gravitational forces eventually could bring the galaxies together to form one large galaxy. The name of this grouping, Seyfert's Sextet, implies that six galaxies are participating in the action. But only four galaxies are...

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Word of the Day
drawcansir
  • A blustering, bullying fellow; a pot-valiant braggart; a bully.
This word is named for Draw-Can-Sir, a character in George Villiers' 17th century play The Rehearsal.
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