After decades of searching, astronomers have imaged two supermassive black holes in orbit around each other at the heart of quasar OJ287. Astronomers have captured a radio image showing two black ...

Skywatchers are set for something special after dark on Monday, Oct. 20, through Tuesday, Oct. 21, when an annual meteor shower produced by Halley's Comet peaks just as two recently discovered comets ...

Artist’s impression of the powerful winds blowing from the bright X-ray source GX13+1. The X-rays are coming from a disc of hot matter, known as an accretion disc, that is gradually spiralling down to ...