Spitzer Spies Monster Galaxy Pileup

Four galaxies are slamming into each other and kicking up billions of stars in one of the largest cosmic smash-ups ever observed.

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<p><a href="http://www.physorg.com/news105632804.html">Spitzer Spies Monster Galaxy Pileup</a></p> <p>Four galaxies are slamming into each other and kicking up billions of stars in one of the largest cosmic smash-ups ever observed. </p>