SPACE PHOTOS THIS WEEK: Massive Galaxy Cluster, More

SPACE PHOTOS THIS WEEK: Massive Galaxy Cluster, More
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August 25, 2008--The most massive cluster of galaxies known in the distant universe was confirmed by this image from Arizona's Large Binocular Telescope.

Individual galaxies within the larger blue cluster (known as 2XMM J083026+524133) appear as tiny dots at the staggering distance of some 7,700 million light-years.

The cluster holds many gravity-bound galaxies as well as superheated gasses, up to a hundred million degrees Kelvin that produce X-ray heat radiation seen as a blue glow.
—Image by ESA XMM-Newton/EPIC, LBT/LBC, AIP (J. Kohnert)
 
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