Space-time being rippled by waves from supermassive black holes

29 June 2023

Scientists think low-frequency gravitational waves generated by super-massive black holes found at the centres of some galaxies may be sending ripples through the fabric of space-time. While astronomers still aren’t one-hundred percent sure these waves exist, they would help in the study of super-massive black holes, if they did.

The super-massive black hole, Sagittarius A — also known as Sag A — at the centre of our galaxy, the Milky Way, may not be a generator of these gravitational waves though. At a mere four point three million times the mass of the Sun, it’s considered to be a relatively small, er, super-massive black hole.