A newly reignited supermassive black hole in galaxy J1007+3540 has shocked astronomers with a colossal eruption, creating a cosmic explosion stretching nearly a million light-years. A new discovery from astronomers offers an unprecedented glimpse into the volatile nature of supermassive black holes. Published in Monthly Notices of the Royal Astronomical Society, the study focuses on galaxy J1007+3540, where a black hole at its c... [4589 chars]