Twelve people walked on the Moon, all between July 1969 and December 1972. Hardware for at least three more missions was ...

Gemini astronauts risked their lives to prove that spacewalking was possible.

Early Apollo Missions: Earth Orbit Apollo missions flew unmanned until October 11, 1968, when Wally Schirra, Donn Eisele and ...

That's one small step for a man. One very expensive leap for the United States. Okay, sure, some would argue focusing on the total cost of the Apollo program defeats the purpose. Stepping onto the ...

Almost forgotten now, the mission circled the Earth for 10 days, performing a series of tests with the lunar lander. What it lacked in glory it made up for in technological contributions. By Kenneth ...

Protected inside a glass case are some precious boots. Technically called astronaut "overshoes," they seem perfectly preserved, almost pristine. But a closer look reveals bits of gray lunar dust ...

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. Walter Cunningham ...

The Space Race was a technological battle fought by Soviet and American scientists and engineers, and by Soviet cosmonauts ...