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How much of the cosmic X-ray background was resolved into separate sources by Chandra?
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Quasar
Six quasar host galaxies, as observed by the Hubble Space Telescope.
Shown are apparently normal, solitary galaxies (left), colliding galaxies (centre), and merging galaxies (right).
The Chandra X-ray Observatory utilized its high-angular-resolution capabilities to resolve the cosmic X-ray background into discrete sources. Research determined that approximately 75 percent of this background radiation was produced by roughly 70 million individual sources spread uniformly across the sky.1