A Harvard University astrophysicist has sparked a furious debate by warning he cannot rule out that extraterrestrials are ...

A mysterious cosmic scar reveals two massive stars that passed near our solar system millions of years ago, energizing nearby ...

Astronomers traced a mysterious 'scar' of ionized gas around the solar system to two stars that had a close flyby with our ...

Originally designed to help rescue astronauts, the X-37B now flies secret missions lasting years at a time. Its payload is ...

Is this the moment? Scientists detect a signal that might be dark matter ...

"Avatar: Fire and Ash" is very visual in its storytelling, including one gripping fight between the characters played by ...

NASA's Hubble Space Telescope has gotten a rare peek at the aftermath of two cosmic collisions — and helped scientists solve ...

Interstellar object 3I/ATLAS is making its closest approach to Earth in just over a week from now, coming within 167 million ...

A pair of nascent planets have been caught smashing together around the nearby star Fomalhaut, and in doing so have solved the puzzle of its famous ‘planet’ ...

Smooth filaments stretching for many light-years, seen by the powerful space telescope, could indicate what the right "recipe ...

Researchers using the James Webb Space Telescope spotted huge stars leaking nitrogen in an early galaxy, hinting that such ...

SpaceX just launched a secret payload for the U.S. military. A Falcon 9 rocket lifted off into cloudy skies from Florida's ...