Besides stars, the United States Navy uses quasars as beacons. Quasars are distant galaxies with supermassive black holes, surrounded by ... X-Ray Flashes from a Nearby Supermassive Black Hole ...
As far as supermassive black holes go, the one at the center of the Milky Way is relatively sedate. But, even in its supposed quiescent state, Sagittarius A* is prone to the occasional belch or ...
A NASA study estimates 35% of supermassive black holes are hidden, shrouded by gas and dust, doubling earlier estimates. Explore how these elusive giants shape our understanding of galaxies.