The ion tail appeared as Comet C/2025 R3 PanSTARRS was about 45 million miles from Earth (72 million kilometers) during its ...

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.

It sounds like something that belongs to another planet. It sounds unlikely, but some scientists think Earth may once have ...

One thing that seems certain to unite the world’s people beyond language barriers, political differences, is space ...