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

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

A new study suggests that the comet that rambled past us from another star last year likely originated in a cold, isolated ...

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.

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

Astronomers studying interstellar comet 3I/ATLAS have found it contains water with deuterium levels about 40 times higher than Earth’s oceans, indicating it formed in an environment colder than any in ...

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

A comet named 3I/ATLAS was first discovered on July 1, 2025, and is located about 420 million miles away from Earth, ...

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

Christopher Nolan's sci-fi movie Interstellar revitalized cinema set in outer space, but it also inspired this hidden TV gem ...

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

Interstellar comet 3I/ATLAS is now on its way out of our solar system, never to return. The comet was only the third-ever ...