... Tonight's Sky . ... Behemoth black hole found in an unlikely place . ... galaxies . ... black holes . ... Astronomy for Kids . ... Ghost remains after black hole eruption . ... This result hints that the X-ray sky should be littered with such ghosts," said Caitlin Casey, also of Cambridge University, "especially if black hole eruptions are as common as we think they are in the early universe." ... Even after the ghost disappears, most of the energy from the black hole's eruption remains," said...