The document provides a history of key spacecraft discoveries and space missions, including Vostok-1 which carried the first man to space, Yuri Gagarin. It discusses the Mercury, Gemini, and Apollo programs which worked to develop techniques for manned spaceflight. Additional space stations and missions discussed include Skylab, the first US space station; Soyuz missions to the Russian space station Mir; the Space Shuttle program; and the ongoing International Space Station.