About 900 million years ago, there was a collision between a black hole and another compact object which resulted in gravitational waves being spewed out into space. The LIGO and VIRGO collaborations which look for gravitational waves emanating from such events have picked up this signal. Astrophysicists are keenly analysing this signal, as it could signify new insights into black hole physics or hold promise for developing gravitational wave astronomy. On August 14, the LIGO collaboration announced a ‘super-event’ alert on its GraceDB (Gravitational Wave Candidate Event Database). The event, dubbed S190814bv, after the date of its discovery, has sent waves of excitement through the astrophysics community because it is unlike any that has been detected so far. “Early analysis suggests these originated from the collision of a black hole with ‘something else’,” says Karan Jani, astrophysicist and LIGO scientist at Vanderbilt University, U.S. The ‘something else’ here could be a n...