NPR's Scott Detrow talks with Regina Barber and Nell Greenfieldboyce about the Artemis moon missions, the "seismic quiet" during a solar eclipse, and the origins of a mysterious interstellar visitor.

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

Astronomers have conducted the first isotopic analysis of an interstellar comet, 3I/ATLAS, revealing it formed in an extremely cold, remote part of the Milky Way. The comet’s water contains deuterium ...

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

Less than a year ago, astronomers discovered a comet soaring through our sky that was not from our solar system. Although we ...

A comet from another star system is carrying water unlike anything astronomers have seen before. The interstellar visitor ...

Scientists studying 3I/ATLAS have detected unusually high levels of heavy water, indicating it formed in an extremely cold ...

Astronomers have peered into water vapor released by 3I/ATLAS and discovered key clues about its home star system.

Research findings are available online in the journal Nature Astronomy. The original story “ Interstellar Comet 3I/ATLAS ...

New observations of interstellar comet 3I/ATLAS show high levels of deuterated water, suggesting it formed in a colder star ...

New research reveals that the mysterious interstellar visitor 3I/ATLAS comes from a very cold alien environment, new research ...

A telescope tracked an alien comet after its solar pass, and the chemistry it found inside was nothing like what came before.