The researchers, led by Fabio Pacucci (also of Scuola Normale Superiore), identified two probable supermassive black hole "seeds" after studying observations made by NASA's Chandra X-ray Observatory, Spitzer Space Telescope and Hubble Space Telescope (which NASA operates jointly with the European Space Agency). "Black hole seeds are extremely hard to find, and confirming their detection is very difficult," co-author Andrea Grazian, from the National Institute for Astrophysics in Italy, said in the same statement.
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