Project Hail Mary, Solaris, and The Hitchhiker's Guide to the Galaxy are all among the very best sci-fi books set in space.

Are we alone in the universe? Consider mysterious "extraterrestrial" radio signals. Unexplained gases on other planets.

Scientists are calling for a lunar quarantine facility where samples from Mars, the Moon, and beyond would be examined before being brought to Earth. They warn that even a tiny alien microorganism ...

With new technologies come new opportunities. And that is especially true in astronomy—with every new advanced telescope, we ...

A SpaceX Falcon 9 rocket launched 81 payloads to orbit from California early Tuesday morning (July 7), then landed on a ship ...

A space thruster using superconducting magnets completed its first orbital tests and could someday propel spacecraft using ...