Jupiter's fourth-largest moon is a main character in our search for other life-friendly places in our solar system.

CHICAGO -- A NASA spacecraft has intentionally slammed into an asteroid in humanity's first test of planetary defense. The impact occurred at 7:15 p.m. ET greeted by cheers from the mission team in ...

The rocket is about to traverse four miles to the launchpad — at about 1 mph.

Artemis 2 is at the launch pad, but several big tests must be performed before it launches as soon as Feb. 6.

Former astronauts raise concerns about Artemis II heat shield ...