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 ...

A comet born around another star is carrying water unlike anything ever measured in our solar system. Observations of ...

ALMA reveals unusual “alien” water in interstellar comet 3I/ATLAS, showing it formed in an extremely cold, distant star ...

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

Astronomers analyzed the vapors coming off the comet when it neared the sun and found it had a lot of "heavy" water. That ...

Interstellar comet 3I/ATLAS carries deuterium-rich water, pointing to a far colder birthplace than our solar system. (CREDIT: ...

Measurements of this interstellar comet’s molecular makeup show an excess of heavy water molecules that is dramatically ...

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

The farthest spacecraft from Earth, the Voyager 1 probe, has just shut down another instrument. The reason for this shutdown ...