Harvard's Avi Loeb says a rare sun alignment on 22 January could prove interstellar visitor 3I/ATLAS is an alien spaceship.

NASA has quietly hit pause on what it billed as its first dedicated hunt for alien biosignatures, reacting to fresh data that ...

New photos show off NASA's newly constructed Roman Space Telescope, which will soon help researchers unravel the mysteries of ...

NASA has temporarily stopped part of its investigation into possible signs of life on a faraway planet, after two years of ...

Though Artemis II will not be landing on the lunar surface – Nasa aims to put boots on the ground by 2030, though China is ...

Scientists have discovered more than 6,000 planets beyond our solar system. What if some of them aren't planets at all, but ...

Though 3I/ATLAS poses no threat to Earth or our satellites, its journey highlights how the networks we built for planetary ...

Sci-fi sitcoms are a bit unusual as compared to more traditional comedies, but some, including "Futurama" and "3rd Rock From ...

Harvard expert Avi Loeb claims the 3I/ATLAS comet's path is 'suspiciously' precise, sparking alien theories. NASA reveals the ...

On the other were two more figures in space suits, with the tiniest Stars and Stripes planted in the lunar soil. Cruz ...

NASA and Breakthrough Listen issue a final verdict on the interstellar comet 3I/ATLAS. Is it an alien spaceship? Read the ...

Planets larger than Earth but smaller than Neptune – so called sub-Neptunes – are the most common type of known exoplanet. It ...