Only a month into a new observing run, gravitational-wave observatories have announced five new signals — one of which could turn out to be a black hole swallowing a neutron star.
Astronomers are taking a cue from bats, using a method similar to echolocation to map out the feeding environment around a black hole.
The glow of a star torn up by a supermassive black hole has enabled researchers to measure how fast the black hole whirls around.
A re-analysis of data from LIGO and Virgo brings the number of gravitational-wave detections to 11, including the most distant and most powerful black-hole merger yet discovered.
How did supermassive black holes form? Two studies discovered dozens of middling-mass black holes in dwarf galaxies to fuel an ongoing debate.