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

A comet tearing through the inner solar system at roughly 58 kilometers per second formed between 10 and 12 billion years ago ...

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

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.

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

This artist’s impression compares the semi-heavy water content of the interstellar comet 3I/ATLAS (left) and Earth (right).

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

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

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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 ...

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