A Mega-Merger of Massive Galaxies Caught in the Act
A rare and massive merging of two galaxies that took place when the Universe was just 3 billion years old.
Even though the spacecraft has exhausted its supply of liquid helium coolant necessary to observe the infrared energy of the distant Universe, data collected by ESA’s Herschel space observatory are still helping unravel cosmic mysteries — such as how early elliptical galaxies grew so large so quickly, filling up with stars and then, rather suddenly, shutting down star formation altogether.
Now, using information initially gathered by Herschel and then investigating closer with several other space- and ground-based observatories, researchers have found a “missing link” in the evolution of early ellipticals: an enormous star-sparking merging of two massive galaxies, caught in the act when the Universe was but 3 billion years old.
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© Jason Major for Universe Today, 2013. |
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Post tags: elliptical, esa, galactic collision, galaxy, Herschel, infrared, merger, NASA, star formation, universe
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Source: http://www.universetoday.com/102355/a-mega-merger-of-massive-galaxies-caught-in-the-act/
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