Part of qualifying the Apollo spacecraft was having it float in the Gulf of Mexico for two days with astronauts sealed inside.

The Apollo 17 astronauts photographed one of their PLSS backpacks, unceremoniously dumped on the lunar surface at mission's end. NASA Sometimes a little knowledge can be a dangerous thing, no ...

For Apollo’s Command/Service module, where the astronauts would live most of the time, the limitations were not such a big deal. But for the Lunar Module it was attached to, the challenge was ...

How far from the Lunar Module did the Apollo 11 astronauts wander after touching down on the surface of the Moon? Five meters? Twenty? How far did their “small steps” actually carry them?

Astronaut Michael Collins felt "absolutely isolated" in orbit while his Apollo 11 crewmates walked on the moon.

Designed to house only two people, the craft quickly filled with dangerous levels of carbon dioxide. PS: After the tank blew, why did the astronauts have to move into the Lunar Module?

While preparing for the Apollo moon landings, astronauts needed to practice the final vertical descent on Earth. While NASA considered an electronic simulator or a tethered device, they ultimately ...