Artist's Impression of Phoenix Cluster Galaxy
About this Image
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