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

NASA and Arizona-based startup Katalyst launched a robotic spacecraft over the Pacific on Thursday on a mission to rescue an ...

When the U.S. was born, humanity was still seven years away from balloon-borne flight. Where might we be another 250 years from now, should the nation be fortunate enough to survive that long?

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

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

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 security risks ...

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 ...

If you opened X this week, you may have seen President Donald Trump apparently chatting with two very tall, very pale, platinum-blonde figures in red uniforms, and you may have seen thousands of ...

Those pesky space aliens are at it again … or I should say, conspiracy theorists’ hopes, dreams, fantasies and wish fulfillment, along with a combination of government reluctance to give adversaries ...