... Tonight's Sky . ... Sky this Month . ... Behemoth black hole found in an unlikely place . ... black holes . ... Astronomy for Kids . ... Observing springtime deep-sky objects with a large telescope . ... Telescope and satellite probe violently variable black holes . ... Flickering black hole . ... These are among the fastest observations of a black hole ever obtained with a large optical telescope," Dhillon said. ... Only registered members of Astronomy.com are allowed to comment on this article. ...