Project Mercury was the first human spaceflight program of the United States. It ran from 1959 through 1963 with two goals: putting a human in orbit around the Earth, and doing it before the Soviet Union, as part of the early space race. It succeeded in the first but not the second: in the first Mercury mission on 5 May 1961, Alan Shepard became the first American in space; however the Soviet Union had put Yuri Gagarin into space one month earlier. John Glenn became the first American (third overall, following Gagarin and Titov) to reach orbit on February 20, 1962, during the third manned Mercury flight.
The program included 20 unmanned launches, followed by two suborbital and four orbital flights with astronaut pilots. Early planning and research were carried out by the National Advisory Committee for Aeronautics (NACA), but the program was officially conducted by its successor organization, NASA. It also absorbed the USAF program Man In Space Soonest which had had the same objectives. Mercury laid the groundwork for Project Gemini and the follow-on Apollo moon-landing program.
The project name came from Mercury, a Roman god often seen as a symbol of speed. Mercury is also the name of the innermost planet of the Solar System, which moves faster than any other and hence conveys an image of speed, although Project Mercury had no other connection to the planet.
Read more about Project Mercury: Goals and Guidelines, Contractors, Launch Vehicles, Mission Profile, Space Race, Program Cost
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