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

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

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 ...

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

NASA's daring Swift Boost mission launches June 27 to save the nearly 22-year-old Swift observatory , which is being dragged ...

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

A one-of-a-kind NASA space telescope is about to fall out of the sky. For more than two decades, the Neil Gehrels Swift ...

A rocket launching to space from an airplane is sort of like a hat on a hat, but you know what? The more hats, the better.