The image of supermassive black hole Sagittarius A * was created using data from the Event Horizon Telescope Collaboration.

We measure the extremely long distances between things in space by light years. A light year is the distance that light travels in one Earth year. Light travels at about 300,000 kilometres per second.

A pair of stars orbiting one another has been found near the supermassive black hole Sagittarius A* using the European ...

A new class of cosmic explosions — which emit more energy than any other brightness-changing event — may come from megastars getting shredded by supermassive black holes (illustrated). Adam ...