Portal:Spaceflight/On This Day/27 April

• 1958 - A Sputnik fails to launch an unknown satellite.
• 1961 - A Juno II launches the Explorer 11 spacecraft.
• 1964 - A Thor-Agena launches a CORONA satellite.
• 1967 - A Vostok-2M launches the Kosmos 156 satellite.
• 1977 - A Kosmos-3M launches the Kosmos 906 satellite.
• 1979 - A Soyuz-U launches the Kosmos 1097 satellite.
• 1980 - A Soyuz-U launches the Progress 9 spacecraft to resupply Salyut 6.
• 1987 - A Tsyklon-3 launches the Kosmos 1842 satellite.
• 1988 - A Soyuz-U launches the Kosmos 1941 satellite.
• 1993 - A Soyuz-U launches the Kosmos 2243 satellite.
• 1999 - An Athena-2 fails to launch the Ikonos-1 satellite.
• 2008 - The Mobile Service Structure at Cape Canaveral LC-40 is demolished.
• 2010 - A Kosmos-3M launches the Kosmos-2463 satellite.
• 2011 - A Soyuz-U launches the Progress M-10M spacecraft to resupply the ISS.