Black Holes

Black holes seem to get all the attention. But what about their mirror twins, white holes? Do they exist? And, if so, where are they?

NANOGrav made the first detection of low-frequency gravitational waves this year. Now, the hunt is on to find the source of these ripples in space — and supermassive black holes are lead suspects.

For the first time, astronomers have spotted small-scale super-fast changes in a jet of super-energetic plasma jet blasting out from a small black hole.

But don't panic — the powerful blazar is located 400 million light-years from Earth.

The name Oppenheimer will always be synonymous with the power and destruction of the atomic bomb, but the physicist also played an essential role in the study of black holes.

Only an extreme environment could hide the collision of two stellar-mass black holes — and feeding supermassive black holes could provide such cover.

Astronomers have witnessed one of the most dramatic "switching on" events ever seen as a distant supermassive black hole began greedily feasting on its surrounding matter.

The James Webb Space Telescope has detected the most distant active supermassive black hole to date, and researchers aren't sure how it could have formed so early in the universe's history.

Time dilation, brought about by the relativistic expansion of space, has resulted in the observed slowing of 'clocks' in the early universe.

Observing time distortions could show whether Einstein's theory of general relativity accounts for the mysteries of dark matter and dark energy.

The James Webb Space Telescope has seen the starlight from an early galaxy hosting a feeding supermassive black hole for the first time ever.

A new way to estimate the masses of supermassive black holes suggests that these cosmic titans may grow faster than previously believed.

A gamma-ray burst spotted near the core of an ancient galaxy was likely created by an odd demolition-derby-style collision of two stars or stellar remnants, a new study suggests.

Why didn't the universe collapse into a black hole during the earliest moments of the Big Bang? Simply put, because that's not how you make a black hole.

Solitary supermassive black holes lurking in less populated areas of the universe munch on material more commonly than their more crowded counterparts, a new study reports.

A new theory has radically revised Stephen Hawking's 1974 theory of black holes to predict that all objects with mass may eventually disappear.

A second supermassive black hole at the heart of a distant galaxy was confirmed by blasts of energy caused as it plunges through a disk of gas and dust around its larger companion.

Dark matter, the invisible material that makes up the vast majority of the universe's mass, may collect itself to form atoms, a new simulation shows.

Hundreds of lines made from a multitude of gases have been discovered extending outward from the black hole at the center of our galaxy.

NASA's Chandra X-ray Observatory spied a massive "H" structure half the size of our entire galaxy made of blazing hot gas spewing from a distant supermassive black hole.