Massive stars about eight times more massive than the sun explode as supernovae at the end of their lives. The explosions, ...

Some stars may transform into black holes without exploding into supernovae. Now, astronomers have finally spotted it as it ...

The outward force from its fusion can no longer counteract the star's powerful gravity, and the star collapses in on itself.

The Milky Way and Andromeda each contain a central supermassive black hole. These black holes will eventually spiral into one another and converge near the center of the newly formed galaxy over a ...

Now that may sound big, but Sagittarius A* is small compared to other supermassive black holes. Take the one at the center of our neighbor the Andromeda galaxy, which has a diameter of 516 million ...

Astronomers have witnessed a rare cosmic event, where a massive star in the Andromeda galaxy (M31) has transformed directly into a black hole, without the usual supernova explosion. The phenomenon ...

A star that winked out of view could be a “failed supernova,” a stellar explosion that petered out instead of fully detonating, a new study reports. If real, the failed supernova would mark the birth ...

How do you satiate the hunger of a supermassive black hole? With light-years-long rivers of cosmic dust, astronomers say. Scientists have found evidence of remarkably long dust streams spiraling ...

Active galaxy—A galaxy with an unusually strong output of energy, thought to be powered by a supermassive black hole in its core. Andromeda Galaxy—The nearest large spiral galaxy to the Milky ...

speculates what it might take for the area around the black hole to be active again. explains that in time, galactic cannibalism will occur when the Andromeda galaxy is 2 million light years away ...

This illustration shows a stage in the predicted merger between our Milky Way galaxy and the ... [+] neighboring Andromeda galaxy, as it will unfold over the next several billion years.