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

The astronomer used the Atacama Large Millimeter/submillimeter Array (ALMA) in Chile to make the observations.

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

"Each interstellar comet brings a little bit of its history, its fossils, from elsewhere." ...

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

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

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

Scientists have found unusually high heavy water levels in interstellar comet 3I/ATLAS. The finding suggests it formed in a ...

The interplanetary comet 3I/ATLAS is remarkably rich in a specific type of water that contains deuterium, meaning it came ...

The comet that rambled past us from another star last year likely originated in a cold, isolated corner of the galaxy that ...

When astronomers pointed the Atacama Large Millimeter/submillimeter Array at a small comet streaking through the inner solar ...