Black holes live forever, at least according to general relativity. Once material crosses a black hole's event horizon, it is trapped forever, until the last day of cosmic time. But we know that isn't ...

In 1916, only a year after Albert Einstein had published his general theory of relativity, Karl Schwarzschild used mathematical calculations to show this: If sufficient mass could be placed into an ...

Before I read your question, I had never heard of a white hole. So, I scampered over to my friend Vivienne Baldassare to find out more. She’s an astrophysicist at Washington State University. She told ...

White holes, the theoretical opposites of black holes, exist only in mathematical equations—at least for now. They emerge naturally from Einstein’s general relativity, yet defy physical intuition by ...

Black holes are some of the most fascinating phenomena in the cosmos. When you hear the word ‘black hole’, you feel intrigued. It seems like a synonym of darkness, mystery, oblivion, a space from ...

A new simulation could help solve one of astronomy’s longstanding mysteries—how supermassive black holes formed so rapidly—along with a new one: What are the James Webb Space Telescope’s (JWST) ...

Researchers believe the 'ultramassive' black hole is big enough to be the largest of its kind ever detected. Black holes are regions of space where the pull of gravity is so intense that even light ...

The most massive black holes in the Universe detected by the ripples they make in space time were not born directly from ...