WASHINGTON — The formation of a black hole can be quite a violent event, with a massive dying star blowing up and some of its remnants collapsing to form an exceptionally dense object with gravity so ...

Astronomers report a supergiant star in the Andromeda Galaxy, M31-2014-DS1, collapsed directly into a black hole without a supernova, confirming predictions of failed stellar explosions.

A massive star roughly 2.5 million light-years away in the Andromeda Galaxy has quietly disappeared, and the best explanation is that it collapsed directly into a black hole without producing a ...

In the nearby Andromeda Galaxy, a massive star bright enough to stand out for years has gone dark. Not in a blaze of glory. Not in a supernova that would briefly outshine its entire galaxy. It just ...

One of our universe's biggest stars has dramatically turned into a rare, yellow 'hypergiant' star, and astronomers aren't sure when it will go supernova.

Add Yahoo as a preferred source to see more of our stories on Google. An illustration of a star that collapsed, forming a black hole without an explosive supernova event, where it's surrounded by a ...

An illustration of a star that collapsed, forming a black hole without an explosive supernova event, where it's surrounded by a dust shell moving away from the unseen black hole at the center and gas ...