An astronaut in need of medical care is on the way back to Earth. The ailing astronaut departed the International Space ...

With its departure ahead of Crew-12's arrival, Crew-11 leaves behind a skeleton crew of three aboard the ISS, including ...

A rogue comet from another star system is rewriting the textbook on how cosmic visitors behave deep inside our solar system.

In 1965, both the U.S. and USSR realized something was already on the moon. Lunar probes captured evidence — and then those ...