Even Though it Was Observing an Asteroid, OSIRIS-REx Accidentally Spotted a Black Hole

While the OSIRIS-REx spacecraft was orbiting asteroid Bennu,
one of the instruments on board happened to catch a glimpse of a black hole out
of the corner of its eye, so to speak.
While intently focusing on the asteroid, the Regolith X-Ray Imaging Spectro… [+4355 chars]Source