A strange, starless object is forcing astronomers to rethink how galaxies are born. Using the Hubble Space Telescope, NASA scientists have identified a massive cloud of dark matter and gas that looks ...
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NASA's Chandra telescope uses 'X-arithmetic' to reveal how black holes shape galaxy clusters (images)
New images from NASA's Chandra X-ray Observatory give galaxy clusters a bold new splash of color, highlighting the beauty of these cosmic giants. Galaxy clusters are the most massive objects in the ...
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