This artist's concept shows a galaxy with a supermassive black hole at its core. The black hole is shooting out jets of radio waves. New research led by theoretical astrophysicist David Garofalo of NASA's Jet Propulsion Laboratory in Pasadena, Calif.
We already know that black holes swallow stars — and entire solar systems — but what effect does a stellar diet have on black holes? A new study suggests that eating stars is what turns baby black holes into supermassive black holes.