By measuring subtle changes in the timing of millisecond pulsar flashes, researchers are close to confirming the presence of a background “sea” of gravity waves.
Gravity waves indicate the birth of an elusive intermediate-mass black hole, raising fresh questions about the gap between stellar and supermassive black holes.
Black holes merging in the accretion disc of a supermassive black hole like the one at the core of the Milky Way might generate a visible signature, astronomers say.
The LIGO and VIRGO collaboration has announced the detection of gravitational waves from four previously unseen black hole mergers, including one that happened nine billion years ago