Apollo missions 8 and 10–17 were the nine crewed missions to the Moon. Apollo 4–6 and AS-201 and AS-202 were uncrewed, while AS-203 is considered a test flight. The Apollo program included three other crewed missions: Apollo 1 (AS-204) did not launch and its crew died in a ground-based capsule fire, while Apollo 7 and Apollo 9 were low Earth orbit missions that only tested spacecraft components and docking maneuvers. Apollo missions 18, 19, and 20 were canceled. Twelve astronauts later flew unused Apollo command modules in the Apollo Applications Program's Skylab and Apollo–Soyuz Test Project. Of the 24 astronauts who flew to the Moon, two went on to command a Skylab mission, one commanded Apollo–Soyuz, one flew as commander for Approach and Landing Tests of the Space Shuttle, and two commanded orbital Space Shuttle missions.
Apollo missions 8 and 10–17 were the nine crewed missions to the Moon Apollo 4–6 and AS-201 and AS-202 were uncrewed while AS-203 is considered a test flight The Apollo program included three other crewed missions Apollo 1 (AS-204) did not launch and its crew died in a ground-based capsule fire while Apollo 7 and Apollo 9 were low Earth orbit missions that only tested spacecraft components and docking maneuvers Apollo missions 18 19 and 20 were canceled Twelve astronauts later flew unused Apollo command modules in the Apollo Applications Program's Skylab and Apollo–Soyuz Test Project Of the 24 astronauts who flew to the Moon two went on to command a Skylab mission one commanded Apollo–Soyuz one flew as commander for Approach and Landing Tests of the Space Shuttle and two commanded orbital Space Shuttle missions