New 3I/ATLAS images from NASA and the ESA suggest the interstellar comet is active as it approaches Earth in December.

Astronomers at the University of North Carolina at Chapel Hill have helped uncover new clues about the longest-lasting cosmic ...

A remarkably clean gravitational-wave detection has confirmed long-standing predictions about black holes, including ...

The idea that we might be living in a simulated reality has worried us for centuries. Now physicists have found some ...