The moon and sun share top billing in 2026. Kicking off the year's cosmic wonders is the moon, drawing the first astronauts ...

Last Friday, the interstellar comet designated 3I/ATLAS completed its closest approach to Earth without crashing into us or depositing an invading armada.

Interstellar comet 3I/ATLAS completes its near-miss with Earth, revealing bizarre chemistry and highlighting the growing ...

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 ...

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 ...

There has been a lot of buzz around interstellar comet 3I/ATLAS over the past couple of months. It is the third confirmed ...

Comet 3I/ATLAS will get closest to Earth on Dec. 19, and astronomers will be watching.

The interstellar comet 3I/ATLAS, which has captivated astronomers worldwide for months, safely passed Earth early this morning. At approximately 06:00 GMT, the object reached its closest approach, ...

On December 19, this interstellar visitor with its peculiar composition offers a glimpse into the makeup of celestial bodies beyond the Sun ...