Stock Photo - This Chandra image shows hot gas enveloping the extremely distant galaxy known as 3C294. Astronomers believe this is the most distant cluster of galaxies ever detected in x_rays, capturing it when the universe was only 20 percent of its current age. The existence of such a faraway cluster may have important implications for how the universe evolved.

Stock Photo: This Chandra image shows hot gas enveloping the extremely distant galaxy known as 3C294. Astronomers believe this is the most distant cluster of galaxies ever.

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