Supermassive black holes are pointing jets of plasma directly at Earth - and a population of them may have produced the highest-energy neutrino ever recorded

At the centre of most large galaxies sits a supermassive black hole. When that black hole is actively consuming surrounding material, it becomes what astronomers call an active galactic nucleus. The infalling matter forms a disc, heats to extreme temperatures, and generates powerful jets of plasma that fire outward from the poles at close to […] At the centre of most large galaxies sits a supermassive black hole. When that black hole is actively consuming surrounding material, it becomes what astronomers call an active galactic nucleus. The infalling matter forms a disc, heats to extreme tem... [9521 chars]