SpaceThe earliest black holes seen by JWST appear to be unusually massive Observations by the James Webb Space Telescope suggest supermassive black holes from the early universe are more massive in relation to their galaxies compared with those near us News
SpaceA guide to cosmic fireworks, from stellar flares to black-hole beacons Far from serene, the night sky is a riot of spectacular bangs and flashes that reveal the universe at its most extreme. Here, an astronomer explains the explosive physics behind them and what they tell us Features