But in a universe first, two 'belches' have been found coming from a supermassive black hole.
The two burps, which occurred across a time span of 100,000 years, appear to show black holes go through cycles of feasting on matter around them, belching out particles, then going into a period of rest before starting up again.
"Black holes are voracious eaters, but it turns out they don't have very good table manners," Julie Comerford, from the University of Colorado, told the 231st American Astronomical Society meeting in Washington DC.
