Artist's Impression of Phoenix Cluster Galaxy

Artist's impression of the galaxy at the center of the Phoenix Cluster, which is forming about 740 new stars per year. Image released August 15, 2012. (Image credit: Chandra X-ray Observatory)

An extraordinary cluster of faraway galaxies is shattering or challenging a number of cosmic records, weighing in as potentially the most massive cluster known.The colossal galaxy cluster is also the brightest in X-ray light, and the galaxy at its heart apparently gives birth to more than 700 stars per year - hundreds of times as fast as our Milky Way forms stars, researchers say.

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