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 ...

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

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

The probe launched almost 50 years ago and is the farthest human-made object from Earth. Shutting down one of its scientific ...

CAPE CANAVERAL, Fla. (AP) — The comet that rambled past us from another star last year likely originated in a cold, isolated corner of the galaxy that had yet to gel into its own solar system, ...

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

The farthest spacecraft from Earth has shut down another instrument in the hopes of buying time for an upgrade that could ...

We spoke to a genuine astrophysicist about the accuracy of Star Trek's approach to interstellar travel, the holodeck, and the ...