New observations from the Hubble Space Telescope have revealed surprising activity inside the Andromeda galaxy. The data shows structures and behavior that don’t fit neatly with existing models of how ...

In A Nutshell A massive star in the Andromeda Galaxy faded by more than 10,000 times over a decade and vanished from view, ...

A vast, flat sheet of dark matter may solve the long-standing mystery of why our neighboring galaxy Andromeda is speeding ...

For years, astronomers have observed the strange motion of Andromeda, the Milky Way’s closest large galactic neighbor. While ...

On a clear night, the Milky Way and the Andromeda galaxy look like close neighbors. In space, they really are.

For nearly a century, astronomers have known that the universe is expanding. Most galaxies are carried outward with the flow ...

Astronomers have caught a massive star in the Andromeda Galaxy quietly dying, collapsing into a black hole without producing a supernova, leaving behind little more than a fading trace. The findings ...

A “disappearing” star in the Andromeda galaxy is the closest and best candidate for a newborn black hole that astronomers have ever seen ...

Astronomers have caught a massive star in the Andromeda Galaxy quietly dying, collapsing into a black hole without producing a supernova, leaving ...

A massive star in the nearby Andromeda galaxy has simply disappeared. Some astronomers believe that it's collapsed in on ...

DS1, collapsed into a black hole without exploding, revealing how stars die in silent “failed supernova” events.