Nuclear power plants are safer than many suspect. But putting reactors in space is a concept with a checkered history. One ...

The moon and Venus will appear close together in the night sky Monday, May 18, visible across the Northern Hemisphere.

Although the mission's four astronauts sent a few photos to Earth while in space, most needed to be delivered via physical ...

NASA’s moon exploration plans call for nearly 80 launches, nearly 75 landers, 10 moon buggies and one nuclear reactor ...

Living on sunlight and batteries at the moon's south pole.

The Artemis 2 astronauts saw several impact flashes on the moon during their epic flyby, observations that have excited ...