The presence of deuterium, an isotope of hydrogen, in 3I/ATLAS suggests the interstellar comet formed in a much colder place ...

Harvard astronomer Avi Loeb joined ChicagoLIVE to discuss new developments in the search for extraterrestrial life, including ...

- Lagoon Nebula (M8) is an emission nebula in Sagittarius.

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

For the first time in the history of space exploration, a robot on the surface of another planet looked up and photographed a ...

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

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.

If an alien in the Alpha Centauri star system were craving pizza, it would take tens of thousands of years to deliver it ...

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

A technique inspired by the film Interstellar suggests a new way of communicating backwards in time, but it could help ...

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

Researchers at Texas A&M University have demonstrated a laser-driven propulsion system that can lift ...