Find out about the main events that have taken place on this day over the years.

On July 21, 2011, NASA marked the end of one of the most iconic chapters in space exploration as Space Shuttle Atlantis touched down at Kennedy Space Center, concluding the final mission of the Space ...

Stream now with KPBS Passport on KPBS+ / Watch Tuesday, July 21, 2026 at 10 p.m. on KPBS TV. When the Soviet Union falls, ...

NASA's Viking 1 mission blazed a crucial trail with its Mars landing on July 20, 1976. Now, half a century later, that trail ...

NASA's Artemis III mission is shaping up to be NASA's most complex mission in history, coordinating the launch and rendezvous ...

St. Mary’s College hosts first Space STEM Camp for 28 Southern Maryland high school students. Hands-on rocketry, astronomy ...

NASA confirms that the Artemis III mission, aimed at advancing lunar exploration, will proceed as scheduled next year. This assurance comes despite a recent setback involving an unmanned Blue Origin ...