Apollo 9 launched three astronauts on the first crewed test flight of NASA’s lunar module, which astronauts later used to land on the moon. Astronauts James McDivitt, David Scott and Rusty Schweickart ...

If all goes as planned, it will be the first time private citizens conduct a spacewalk, but they won't venture away from the capsule. Considered one of the riskiest parts of spaceflight ...