We could see robots working on NASA's Habitable Worlds Observatory out in space.

The aerospace startup Aspire is designing a fully reusable rocket that could make launches cheaper. It might just beat Elon ...

A NASA insider's old allegation that UFO images were removed from agency photographs before public release has resurfaced ...

A deleted scene finally explains the blockbuster’s most mocked plot hole, making its infamous alien hacking twist far easier ...

This new group, which is led by Harvard professor Avi Loeb, aims to advise the Trump administration and the U.S. intelligence ...

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 ...

Somewhere in the Mojave Desert, a gleaming white dome sits in the middle of nowhere, and the story behind it is stranger than ...

Why are we allowing unidentified objects to operate with impunity in our skies?” one expert testified Tuesday.

Astronomers have recently started looking for black holes bigger than galaxies. Brian Lacki explains how these “stupendously ...

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

Matter-antimatter annihilations produce about 10 billion times more energy per unit mass than chemical combustion (which ...