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.
An artist's concept shows a black hole eating material from a nearby star. Researchers say its possible dark matter swirling around a black hole could radiate gamma rays that could be seen by telescopes.