The presence of deuterium, an isotope of hydrogen, in 3I/ATLAS suggests the interstellar comet formed in a much colder place ...

An interstellar comet carries water unlike anything in our solar system, revealing a far colder birthplace and clues about ...

Our time with our interstellar visitor, comet 3I/ATLAS, is almost up. It’s set to leave the solar system soon, after zipping ...

Research findings are available online in the journal Nature Astronomy. The original story “ Interstellar Comet 3I/ATLAS ...

Using the Atacama Large Millimeter/submillimeter Array (ALMA), scientists have discovered that the interstellar invader comet ...

Learn more about the interstellar traveler, Comet 3I/ATLAS, and what researchers know about its place of origin.

CAPE CANAVERAL, Fla. (AP) — The comet that rambled past us from another star last year likely originated in a cold, isolated ...

Interstellar comet 3I/ATLAS is even more extreme. The ratio of semi-heavy water to regular water is 30 times larger than in ...

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

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 ...

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 ...

The interstellar comet 3I/ATLAS was the third object ever discovered in our solar system that originated from another star system. Despite a viral conspiracy theory, NASA officials have repeatedly ...