The Optical Monitor telescope onboard XMM-Newton has obtained one of the most striking ultraviolet pictures ever taken of the ‘LINER’ galaxy M81. Strong ultraviolet (UV) emission is a feature of star ...

Astronomers have watched a supermassive black hole take two bites of a star, and predicted when it might go back for a third. If it does, this should make for an intriguing stellar light show. Black ...

Ultraviolet light has a long history as a disinfectant, and the SARS-CoV-2 virus, which causes COVID-19, is readily rendered harmless by UV light. The question is how best to harness UV light to fight ...