"Eventually, our own Voyager spacecraft will be extraterrestrial artifacts in other stellar systems." ...

Avi Loeb, a Harvard astronomer who has made headlines with his theories about alien encounters, will lead a White House ...

A polarizing Harvard astronomer known for splashy theories about alien visits has been tapped by the Trump administration to ...

Scientists may have just taken one of the biggest steps yet in the search for life beyond Earth. Meet K2 18 b, a distant ...

The question of whether humanity is alone in the universe has fascinated scientists for generations, but few have pursued an ...

By Joey Roulette and Steve Gorman WASHINGTON, July 3 (Reuters) - NASA and Arizona-based startup Katalyst launched a robotic ...

A private rocket mission aims to boost NASA’s Swift telescope before its orbit decays, extending its hunt for gamma-ray ...

Without a rescue mission, NASA’s Swift Observatory, which studies some of the most powerful explosions in the universe, will ...

A three-armed spacecraft is rushing to the rescue of a NASA telescope that’s in danger of crashing back to Earth.

A rush rescue mission to save a NASA space telescope remains grounded, this time because of a last-minute launch problem.

NASA has launched the LINK spacecraft on a mission to rendezvous with the aging Swift observatory and boost it into a higher ...