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 ...

Extreme cosmic events such as colliding black holes or the explosions of stars can cause ripples in spacetime, so-called gravitational waves. Their discovery opened a new window into the universe. To ...

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

"This pushes our models to their limits and challenges our existing ideas about how these X-ray flashes are being generated." ...

Secretary of Defense Pete Hegseth went all in on his President Trump impression during a visit with troops—and he did not ...

Timelapse footage released by the Philippine Institute of Volcanology and Seismology (PHIVOLCS) captured the explosive ...

Simulations of highly magnetized stars that explode and collapse into black holes show that they transfer their magnetic fields to the disk of swirling matter that forms around the new black hole.

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When two galaxies collide and merge, gas is funneled into the central region of that merger. Some of that gas ends up getting close to the newly merged black hole and forms the accretion disk.