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

If confirmed, this disappearing act might provide the closest and best observational evidence for the birth of a black hole ...

Their research was guided by a prediction from the 1970s: if a star collapses directly into a black hole, it should briefly ...

Forbes contributors publish independent expert analyses and insights. An award-winning reporter writing about stargazing and the night sky. This illustration shows a stage in the predicted merger ...

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

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

Did you know that you can see the closest spiral galaxy next to our own in the sky? While binoculars and telescopes will offer much better views, it’s still possible to see it with your naked eye if ...

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

A new composite image of the Andromeda Galaxy is offering an unprecedented view of our closest spiral galactic neighbor. Composed by NASA and international space partners, the image combines data from ...

A close-up view of a prodigious number of stars in the Andromeda galaxy. Credit: NASA / ESA / B. Williams (U. of Washington) The Andromeda galaxy is a colossal marvel in our sky, hosting over 1 ...

The Andromeda Galaxy is revealed in unprecedented detail in four archive observations from the NASA/ESA Hubble Space Telescope. They show stars and structure in the galaxy’s disk, the halo of stars ...