At vast cosmic distances, supermassive black holes called quasars gobble up matter into accretion disks that shine so brightly, they overpower the light from entire galaxies. Closer to home, compact objects called microquasars give astronomers a scaled-down taste of the processes at work inside the faraway behemoths. Now, an international collaboration of researchers has announced in the journal Nature that they’ve detected the first gamma-ray signal from the ends of the two jets spewing out