Astronomers have spotted a mysterious cosmic object that could be the lightest black hole or the heaviest neutron star ever discovered — or something completely new to science. The unknown object, ...

A newly discovered celestial object may be a starless cloud that could change how astronomers understand dark matter.

Interstellar object 3I/ATLAS has surprised scientists by showing no cometary tail after passing close to the Sun. This unexpected behavior challenges the assumption that it's a typical comet, fueling ...

The 3I/ATLAS interstellar object, detected by NASA, is remarkably larger and more massive than earlier estimates, making it an exceptionally rare visitor. Its unusual trajectory and characteristics, ...

It's not quite a star, and it's not quite a planet — but it's soaring through the Milky Way, much closer than we thought. When you purchase through links on our site, we may earn an affiliate ...

A prominent Harvard astrophysicist has claimed that a mysterious object moving through our solar system could be a nuclear-powered spacecraft. Professor Avi Loeb, director of the Galileo Project, ...

A prominent Harvard astrophysicist has claimed that a mysterious object moving through our solar system could be a nuclear-powered spacecraft. Professor Avi Loeb, director of the Galileo Project, ...