Sets of Three – Part Six

Early NASA Projects
(a) Mercury
carried only one astronaut
(b) Gemini
carried two astronauts
(c) Apollo
carried three astronauts

Apollo Crew
(a) Mission Commander (e.g. Neil Armstrong for Apollo11)
(b) Command Module Pilot (e.g. Michael Collins for Apollo11)
(c) Lunar Module Pilot (e.g. Buzz Aldrin for Apollo11)

Space Modules
(a) Service Module
(b) Command Module
(c) Lunar Module