"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 rare visitor from another star system prompted SETI to hunt for alien technology, but the mysterious object appears to be a ...

WASHINGTON — A polarizing Harvard astronomer known for splashy theories about alien visits has been tapped by the Trump administration to lead a team of outside scientists to study the national ...

The question of whether humanity is alone in the universe has fascinated scientists for generations, but few have pursued an answer as publicly or as controversially as Harvard astrophysicist Avi Loeb ...

Space exploration was a major theme of a state House hearing on Tuesday, even as the budget deadline looms over lawmakers.

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

Harvard astrophysicist Avi Loeb, known for his controversial extraterrestrial theories, is now leading a new Trump ...

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

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