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Artist's Impression of Phoenix Cluster Galaxy
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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.
Credit: Chandra X-ray Observatory
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