GREENBELT, Md., June 6 (UPI) -- An international team of astronomers says it has discovered evidence a significant number of black holes accompanied the earliest stars in the universe.
Using data from NASA's Chandra X-ray Observatory and infrared data from the agency's Spitzer Space Telescope, researchers say they've concluded one of every five cosmic sources contributing to the cosmic infrared background signal -- the collective light from an epoch when structure first emerged in the universe -- is a black hole.