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.

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

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

The Subaru Telescope achieved first light in January 1999 and entered its 27th year of operation in 2026. In March 2025, ...

Long before 3I/ATLAS slipped through the inner solar system, its water had already recorded the kind of place it came from.

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

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

When comet 3I/ATLAS swept past the Sun in late October 2025, it gave astronomers their best chance yet to taste the chemistry ...

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

Astronomers have discovered that the interstellar comet 3I/ATLAS originated in conditions far colder and older than our solar system, offering new insights into its formation.

Scientists have discovered that interstellar comet 3I/ATLAS, a rare visitor to our solar system, likely originated from a ...