Astronomers using the Atacama Large Millimeter/submillimeter Array (ALMA) in Chile have discovered "signs of a ‘hot spot’ orbiting Sagittarius A*," according to the European Southern Observatory (ESO) ...

Intense radiation emitted by active supermassive black holes—thought to reside at the center of most, if not all, galaxies—can slow star growth not just in their host galaxy, but also in galaxies ...

An unusual tidal disruption event spotted by astronomers may be the result of an elusive intermediate mass black hole ripping apart a star.

For every galaxy that's visible from Earth, there are nine smaller ones that we can't see, even with all the technology we've ...

If confirmed, this disappearing act might provide the closest and best observational evidence for the birth of a black hole ...

Beneath a stream of radio noise gathered over the course of a long night of observation, the signal came in quietly.

In a conventional system like our own, rocky planets such as Mercury, Venus, Earth, and Mars orbit closest to the host star. Farther out, gas giants ...