List of Astronauts By Year of Selection - 1959

1959

April 9 – NASA Group 1 – Mercury Seven – USA

Scott Carpenter, Gordon Cooper, John Glenn, Gus Grissom, Wally Schirra, Alan Shepard and Deke Slayton.

Note: The first group of astronauts selected by NASA were for Project Mercury in April 1959. All seven were military test pilots, a requirement specified by President Eisenhower to simplify the selection process. All seven eventually flew in space, although one, Deke Slayton, did not fly a Mercury mission due to a medical disqualification, instead flying later on the Apollo-Soyuz mission. The other six each flew one Mercury mission. For two of these, Scott Carpenter and John Glenn, the Mercury mission was their only flight in the Apollo era (Glenn later flew on the Space Shuttle). Three of the Mercury astronauts, Gus Grissom, Gordon Cooper and Wally Schirra, also each flew a mission during the Gemini program. Alan Shepard was slated to fly Mercury 10 before its cancellation and was the original commander for the Gemini 3 mission, but did not fly due to a medical disqualification. After surgery to correct the problem, he later flew as commander of Apollo 14. He was the only Mercury astronaut to go to the Moon. Wally Schirra also flew on Apollo as commander of Apollo 7, as well as Mercury and Gemini, the only astronaut to fly on all three types of spacecraft. (Gus Grissom was scheduled to fly the first Apollo flight, but died in a fire on the launch pad during training. It is also widely assumed that had he lived, he would have been the first man to walk on the moon.) Gordon Cooper was a backup commander for Apollo 10, the "dress rehearsal" flight for the lunar landing, and would have commanded another mission (likely to have been Apollo 13, according to the crew rotation), but was bumped from the rotation after a disagreement with NASA management.

At least one member of the Mercury Seven flew on every NASA class of human-rated spacecraft (but not space station) through the end of the 20th century: Mercury, Gemini, Apollo, and the Space Shuttle.