quasar

Mauri Valtonen and colleagues have evidence to suggest the occasional bursts of light from the quasar 0J287 are the result of a black hole sucking in matter from another, lighter black hole. (Credit: NASA)

Mauri Valtonen and colleagues have evidence to suggest the occasional bursts of light from the quasar 0J287 are the result of a black hole sucking in matter from another, lighter black hole. (Credit: NASA)