"Finding more supermassive black holes that are potentially hosting jets raises the question as to how these black holes grew ...

Strange x-ray pulses hint at a surprisingly long-lived white dwarf orbiting precariously close to a supermassive black hole ...

Active galactic nuclei are supermassive black holes at the center of certain galaxies. As matter falls into these black holes ...

NASA astronauts Nick Hague and Suni Williams completed a six-hour spacewalk to repair and upgrade equipment outside the ...

The newly discovered "blazar," which has a mass equal to 700 million suns, is the oldest of its kind ever seen and changes ...

"This is how you solve the universe-breaking problem." ...

Astronomers have detected a mid-infrared flare from the supermassive black hole at the heart of the Milky Way galaxy for the ...

Scientists have detected emanating from the nucleus of a galaxy relatively close to our Milky Way flashes of X-rays gradually ...

The dense stellar remnant would, if confirmed, be the closest known object to any black hole, according to preliminary ...

A strange black hole is making scientists scratch their heads.

Researchers found far more hidden black holes than previously known, indicating plenty of behemoths lurking in thick clouds ...

A mysterious black hole has started behaving even more strangely, scientists have said. The supermassive black hole has been ...