Some 1.2 billion light-years from Earth, a massive event is unfolding on cosmic scales. There, not two, but three galaxies ...

Astronomers have found a system of three supermassive black holes, all actively feeding, that appear to be combining into a ...

A supermassive black hole in the spiral galaxy NGC 3783 just delivered an X-ray surprise that astronomers have never watched ...

Astronomers have found three supermassive black holes on a collision course in a rare cosmic event, situated nearly 1.2 ...

In a patch of sky about 1. 2 billion light-years from Earth, astronomers have found a cosmic rarity: three galaxies caught in ...

New observations reveal that the relationship between ultraviolet and X-ray light in quasars has changed over billions of ...

A supermassive black hole that’s 10 million times the mass of the Sun is hurtling through space, leaving a trail of gas ...

A new study on some 1,600 galaxies based on data from the Chandra X-ray Observatory reveals that many small galaxies do not ...

Supermassive black holes, which can possess millions to billions of times the mass of our Sun, are believed to grow by consuming material and merging with other black holes during galactic collisions.

The discovery of a hidden supermassive black hole inside an ancient galaxy suggests that some of our universe's most extreme objects could be invisible unless observed in infrared wavelengths, James ...

A monstrous black hole in a distant galaxy has earned itself a nickname worthy of a science-fiction horror movie for its gluttonous feasting on any stars that dare get near. Meet "Space Jaws." NASA ...

Some galaxies could grow so large by consuming one star from a binary system. April 8, 2012— -- For years, astronomers have puzzled over the diet needed to bulk up supermassive black holes – ...