Scientists detect biggest known black-hole collision

Artist's impression of two black holes merging.

An international team of scientists have detected ripples in space and time, known as gravitational waves, from the biggest known black-hole collision that formed a new black hole about 80 times larger than the Sun – and from another three black-hole mergers. The Australian National University (ANU) is playing a lead

Black Holes Ruled Out As Universe’s Missing Dark Matter

A supernova (bright spot at lower left) and its host galaxy (upper center), as they would appear if gravitationally lensed by an intervening black hole (center).

For one brief shining moment after the 2015 detection of gravitational waves from colliding black holes, astronomers held out hope that the universe’s mysterious dark matter might consist of a plenitude of black holes sprinkled throughout the universe. UC Berkeley physicists have dashed those hopes. Based on a statistical analysis of

Black Holes Might Temporarily Bring Dead Stars Back to Life

Artist concept of a black holes eating a star Illustration

What happens when a dead star meets a black hole? The answer appears to be a brief zombie awakening, according to a new paper. Let me explain. A team of scientists was interested in how white dwarfs—small, dense objects thought to form when bigger stars run out of fuel—interact around black

How Does a Black Hole Form?

Black Hole

There's something inherently fascinating about black holes. Maybe it's that they're invisible beasts lurking in space that sometimes rip passing stars in half and scatter their remains. Whatever it is, these strange cosmic objects continue to captivate scientists and laypeople alike. But where do black holes come from? How do they

X-ray technology reveals never-before-seen matter around black hole


In an international collaboration between Japan and Sweden, scientists clarified how gravity affects the shape of matter near the black hole in binary system Cygnus X-1. Their findings, which were published in Nature Astronomy this month, may help scientists further understand the physics of strong gravity and the evolution of