The cosmos is typically a predictable dance of gravity and orbits, but occasionally, a visitor crashes the party with such ...

As this interstellar object approached its closest point to Earth, a massive radio telescope attempted to sniff out a ...

Three symmetrical jets jutting out of interstellar object 3I/ATLAS are showing up in Hubble observations, puzzling astronomer ...

The Asteroid Terrestrial-impact Last Alert System (ATLAS) in Chile first saw this celestial wanderer on July 1, 2025. It is ...

Think you know your Dyson spheres from your dark blobs? This cosmic crossword dives into the strangest, most mind-bending structures ever spotted — or imagined — in the universe.

Europa has a vast, saltwater ocean beneath its icy shell, with more than twice the amount of water in all of Earth’s oceans ...

If aliens are out there, why haven’t we heard from them? That’s the question at the center of Pop Mech’s new story, “Aliens Probably Exist—But They’re Staying Silent For a Reason, NASA Scientist ...

Is 3I/ATLAS a comet or an alien ship? Harvard's Avi Loeb warns of a 'serial killer' visitor as the interstellar object makes its closest approach to Earth.

An astrophotograph of the interstellar comet known as 3I/ATLAS highlights its green coma and a wandering blue-tinted ion tail. (Copyright Victor Sabet and Julien De ...

Nobody knows what’s next for our species, but these films are full of intellectual wormholes for audiences to dive into. Here ...

Is 3I/ATLAS an alien probe? Breakthrough Listen uses the Green Bank Telescope to search for technosignatures as the ...

The mysterious space rock suggested to be a hostile alien spaceship was due to make its closest approach to Earth today (Dec 19). The rare interstellar visitor, designated Comet 3I/ATLAS, was ...