Portal:Spaceflight/On This Day/21 June


 * 1966 - A Thor-Agena launches a CORONA satellite.
 * 1968 - A Voskhod launches the Kosmos 228 satellite.
 * 1969 - A Delta E launches the Explorer 41 spacecraft.
 * 1972 - A Voskhod launches the Kosmos 493 satellite.
 * 1973 - A Voskhod launches the Kosmos 575 satellite.
 * 1974 - A Kosmos-3M launches the Kosmos 661 satellite.
 * 1975 - A Delta 1910 launches the OSO-8 satellite.
 * 1978 - A Kosmos-3M launches the Kosmos 1023 satellite.
 * 1980 - A Molniya-M launches a Molniya-1 satellite.
 * 1984 - A Kosmos-3M launches the Kosmos 1574 satellite.
 * 1985 - A Soyuz-U launches the Progress 24 spacecraft to resupply Salyut 7.
 * 1985 - A Soyuz-U launches the Kosmos 1663 satellite.
 * 1985 - A Zenit-2 fails to launch an unknown satellite.
 * 1988 - A Kosmos-3M launches the Kosmos 1954 satellite.
 * 1989 - A Proton-K launches a Raduga satellite.
 * 1990 - A Molniya-M fails to launch the Kosmos 2084 satellite.
 * 1993 - launches on the first SpaceHab mission, STS-57.
 * 2004 - SpaceShipOne conducts the first privately funded and developed manned spaceflight, Flight 15P
 * 2005 - A Molniya-M fails to launch a Molniya-3 satellite.
 * 2005 - A Volna fails to launch the Cosmos 1 solar sail.
 * 2006 - A Delta II launches three MiTEx satellites.
 * 2009 - A Zenit-3SLB launches the MEASAT-3a satellite.
 * 2010 - A Dnepr-1 launches the TanDEM-X satellite.
 * 2011 - A Soyuz-U launches the Progress M-11M spacecraft to resupply the ISS.