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

The spins of some early galaxies could be a clue that the entire observable universe exists within a black hole—except, that ...

Ansky, a once-dormant black hole, is now emitting powerful X-ray bursts, giving scientists a rare chance to study its ...

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

A mysterious black hole in a distant galaxy just woke up after decades of silence—and it’s putting on a cosmic light show!

A previously dormant supermassive black hole in the galaxy SDSS1335+0728, located roughly 300 million light-years from Earth, ...

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

In 2022, experts from the University of Amsterdam simulated a black hole event horizon to test Stephen Hawking's 1974 radiation theory.

Travel to the event horizon in this amazing new black hole visualization from NASA's Goddard Space Flight Center. Credit: ...

WATCH: Here’s the first image of the black hole at the center of our galaxy The world got a look Thursday at the first wild but fuzzy image of the supermassive black hole at the center of our ...

"The singularity is the most mysterious and problematic part of a black hole. It's where our concepts of space and time literally no longer make sense." A team of scientists has developed a recipe ...

A new study suggests that a black hole singularity—where time and matter are condensed into infinitely small space—could be a transition to a beginning. This beginning is a white hole—a ...