The crossword solutions for the term ASTRONAUT GEMINI are Walter Schirra (7 letters), CASTOR (6 letters), TANG (4 letters), Agena (5 letters) and SIGN (4 letters). Walter Schirra was an American astronaut who flew on the Mercury-Atlas 8, Gemini 6A and Apollo 7 missions. He was the only astronaut to fly on all three programs. CASTOR was a star in the constellation Gemini, which is the namesake of the Gemini program. The Gemini program was a two-man spaceflight program conducted by NASA from 1965 to 1966. Gus Grissom and John Young were the first astronauts to fly in the Gemini program. TANG was a brand of powdered orange drink mix developed by General Foods in 1957. It was popular among astronauts during the Gemini program. Agena was a rocket stage used by the United States during the Gemini program. It was used to launch satellites into orbit and to rendezvous with other spacecraft. SIGN was the call SIGN of the Gemini 4 mission, which was the first American mission to include an extravehicular activity (EVA). Astronaut Edward White became the first American to walk in space during this mission.