Einstein believed that black holes didn't really exist. But they do: that much we know. We don't know much else about them.

Although we know that supermassive black holes (millions of times the mass of our sun) lurk at the center of most galaxies, ...

A massive black hole at the heart of a galaxy in the Virgo constellation is waking up, shooting out intense X-ray flares at ...

"This rare event provides an opportunity for astronomers to observe a black hole's behavior in real time," said astronomer ...

While solitary black holes should be common, they are hard to find. The one in Sagittarius revealed itself when it passed in front of a dim background star, magnifying the star’s light and slowly ...

Black holes power some of the most energetic phenomena in the known universe, but could they ever power an advanced human ...

ESA's Gaia mission, the Very Large Telescope and other ground-based telescopes have discovered stellar black hole Gaia BH3. It's mass is "33 times that of our Sun," according to the European Southern ...

Explore how the Webb telescope reveals a massive black hole from the early universe living in a dormant state for most of its ...

Scientists have uncovered the strongest evidence yet for the existence of elusive intermediate-mass black holes (IMBHs), long ...

A mysterious black hole in a distant galaxy just woke up after decades of silence—and it’s putting on a cosmic light show! ESA’s XMM-Newton and other X-ray telescopes are capturing massive bursts of ...