Project Mercury was the first crewed spaceflight programme of the United States and the first great undertaking of NASA as a civilian agency. Begun in 1958, the year the agency itself was created, and completed in 1963, it drew on the work…
Project Gemini was NASA's second crewed spaceflight programme and the deliberate bridge between Mercury, which had done little more than prove that a man could orbit the Earth, and Apollo, which had to put him on the Moon. Formally…
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