< Portal:Spaceflight < On This Day 
  
        
      Portal:Spaceflight/On This Day/20 April
- 1964 - A Molniya-M fails to launch an unknown satellite.
 - 1966 - A Vostok-2 rocket launches the Kosmos 115 satellite.
 - 1967 - A Delta E launches the ESSA 5 satellite.
 - 1968 - A Voskhod rocket launches the Kosmos 216 satellite.
 - 1973 - A Delta 1914 launches the Anik A2 satellite.
 - 1974 - A Molniya-M launches a Molniya-1 satellite.
 - 1977 - A Soyuz-U launches the Kosmos 904 satellite.
 - 1977 - A Delta 2914 launches the Geos 1 satellite.
 - 1978 - A Soyuz-U launches the Kosmos 1003 satellite.
 - 1979 - A Soyuz-U launches the Kosmos 1095 satellite.
 - 1983 - A Soyuz-U launches the crewed Soyuz T-8 mission.
 - 1988 - A Vostok-2M launches the Kosmos 1939 satellite.
 - 1989 - A Soyuz-U launches the Kosmos 2018 satellite.
 - 1990 - A Kosmos-3M launches the Kosmos 2074 satellite.
 - 1996 - An Ariane 4 launches the MSAT-1 satellite.
 - 2004 - A Delta II launches the Gravity Probe B satellite.
 - 2006 - An Atlas V 411 launches the Astra 1KR satellite.
 - 2009 - A PSLV launches the RISAT-2 and ANUSAT satellites.
 - 2009 - A Zenit-3SL launches the Sicral 1B satellite.
 - 2011 - A PSLV launches Resourcesat-2 and two other satellites.
 - 2012 - A Soyuz-U launches the Progress M-15M spacecraft to resupply the ISS.
 - 2017 - A Soyuz-FG launches the crewed Soyuz MS-04 mission to the ISS
 
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