I/ATLAS recently passed its closest point to the sun. Because of its unusual behavior, some scientists are wondering if it's ...

Is 3I/Atlas an alien spacecraft or just a really interesting rock hurling through the cosmos? That debate has been raging ...

Dr Loeb has put the odds of an artificial origin for the 3.5-mile-wide 3I/ATLAS at 40%, questioning how it already had a tail ...

The 3I/ATLAS comet was first spotted in July near Jupiter after it entered our solar system from another universe. Here’s ...

Back on planet Earth, and deep inside a pitch-black, sulfuric cave on the Albanian-Greek border, we reported on a study that ...

A rare interstellar comet named 3I/ATLAS is hurtling through the solar system. It would give astronomers a rare glimpse of ...

CAPE CANAVERAL, Fla. — The Hubble Space Telescope has captured the best picture yet of a high-speed comet visiting our solar system from another star. NASA and the European Space Agency released the ...

Look to the stars this week for a chance to spot Comet Tsuchinshan–ATLAS — a “cosmic snowball” that is visible to Earthlings only every 80,000 years. The ideal time to catch a glimpse of the comet is ...

Newly discovered on Jan. 3 at the Mount Lemmon Survey near Tucson, Arizona, it's the "best and brightest" comet we will be able to see from Earth this year, experts have said. The other treat? It's ...