
Quasi periodic eruptions: Powerful blasts of X-rays could reveal a black hole waking from sleep
An artist’s impression of gas and dust around the massive black hole at the centre of the galaxy SDSS1335+0728 ESO/M. Kornmesser Strange X-ray pulses blasted out from a recently awakened monster black hole are the most powerful astronomers have seen, and may help explain how these cosmic behemoths emerge from their slumber. A few years…