NASA’s Hubble Finds More Black Holes than Expected in the Early Universe

The Hubble Ultra Deep Field of nearly 10,000 galaxies is the deepest visible-light image of the cosmos. The image required 800 exposures taken over 400 Hubble orbits around Earth. The total amount of exposure time was 11.3 days, taken between Sept. 24, 2003 and Jan. 16, 2004.

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