Interstellar comet 3I/ATLAS is now on its way out of our solar system, never to return. The comet was only the third-ever ...

Observing the interstellar visitor after its closest approach, astronomers found that its composition appears to have changed ...

The interstellar comet 3I/ATLAS changed significantly as it flew by the sun last fall, astronomers have discovered.

Scientists observe interstellar comet 3I/ATLAS releasing massive water vapor near the Sun, revealing clues about material ...

The comet has been on our radars since the summer of 2025, when the Asteroid Terrestrial-impact Last Alert System (ATLAS) ...

Remember 3I/ATLAS? Yes, the interstellar comet that made plenty of headlines in 2025 is still romping through our solar system. But it may not be around much longer. The otherworldly visitor to ...

Interstellar comet 3I/ATLAS showed changes in its gas composition after passing close to the sun, offering data on its ...

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Forbes contributors publish independent expert analyses and insights. An award-winning reporter writing about stargazing and the night sky. A deep image of interstellar Comet 3I/ATLAS captured by the ...

Pictures of 3I/ATLAS will soon be all we have to remind us of the strange interstellar comet and its brief visit to our cosmic neighborhood. Fortunately, thanks to the world's space agencies, we'll ...

The discovery of interstellar comet 3I/ATLAS last year provided insights into a never-before-seen object. It's different from the two known other interstellar interlopers that we have observed ...