Portal:Spaceflight/On This Day/12 April

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• 1961 - Yuri Gagarin becomes the first man to fly in space, aboard Vostok 1.
• 1964 - A Polyot launches the Polyot-2 spacecraft.
• 1967 - A Voskhod rocket launches the Kosmos-155 satellite.
• 1973 - A Kosmos-2I launches the Kosmos-553 satellite.
• 1974 - A Voskhod rocket fails to launch an unknown satellite.
• 1979 - A Molniya-M launches a Molniya-1 satellite.
• 1980 - A Molniya-M launches the Kosmos-1172 satellite.
• 1981 - Space Shuttle Columbia launches on the Space Shuttle programme's maiden flight, STS-1
• 1983 - A Kosmos-3M launches the Kosmos-1452 satellite.
• 1985 - Space Shuttle Discovery launches on mission STS-51-D to deploy the TELESAT-l and SYNCOM IV-3 satellites.
• 1999 - An Atlas IIAS launches the Eutelsat W3 satellite.
• 2003 - An Atlas IIIB launches the Asiasat 4 satellite.
• 2005 - A Long March 3B launches the Apstar 6 satellite.
• 2006 - A Zenit-3SL launches the JCSAT-9 satellite.