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First black hole in a triple star system found
Star system observed 8,000 light-years away may be the first direct evidence of "gentle" black hole formation.
"Only with precise astrometry from [the European Space Agency's] Gaia mission did it become clear that the star is actually at the same distance and is moving in the same direction as V404 Cygni, meaning that it's gravitationally bound to it." People have actually predicted before that black hole binaries might form mostly through triple evolution, but there was never any direct evidence until now." The study, titled "The black hole low-mass X-ray binary V404 Cygni is part of a wide triple," was funded by the National Science Foundation.
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