When the interstellar object known as 3I/ATLAS swept past Earth on 19 December 2025, it did so under intense global scrutiny.

Interstellar comet 3I/ATLAS will fly by our planet at a safe distance of 1.8 astronomical units (roughly 167 million miles or ...

As interstellar object 3I/ATLAS swept past Earth on 19 December 2025, viral theories claimed cosmic indifference or alien ...

Everyone's favorite interstellar comet, 3I/ATLAS, flew past Earth overnight, coming within about 168 million miles (270 million kilometers) of our planet.

This interstellar vagabond is only the third large interstellar visitor that we have ever discovered — an asteroid or comet ...

Avi Loeb reports new telescope observations of interstellar object 3I/ATLAS, describing a periodic wobble in its anti-tail and what it reveals about rotation ...

The controversial Harvard astronomer is one of the main sources of the "alien mothership" hypothesis. This is what he thinks, ...

Interstellar comet 3I/ATLAS shows a rare sun‑facing anti‑tail, raising concerns that survey telescopes miss exotic visitors ...

The cosmic object, originating from beyond our solar system, sparked curiosity reminiscent of a science-fiction spectacle, ...

I/ATLAS has passed its closest point to Earth, meaning we will soon lose sight of it for good. Some scientists want to send a spacecraft to chase down the alien comet — or the next interstellar object ...

The interstellar comet 3I/ATLAS safely passed Earth this morning as it continues its brief trip through our solar system.

On Friday, 3I/ATLAS will be closer to Earth than ever before and afterward – yet the distance will still be 270 million ...