Portal:Spaceflight/On This Day/20 September

• 1966 - An Atlas-Centaur launches the Surveyor 2 probe.
• 1966 - A Thor-Agena launches a CORONA satellite.
• 1968 - A Kosmos-2I launches the Kosmos 242 satellite.
• 1974 - A Voskhod launches the Kosmos 685 satellite.
• 1977 - A Vostok-2M launches the Kosmos 955 satellite.
• 1977 - A Proton-K launches an Ekran satellite.
• 1979 - An Atlas-Centaur launches the HEAO-3 satellite.
• 1990 - A Molniya-M launches a Molniya-3 satellite.
• 1993 - A PSLV fails to launch the IRS-1E satellite, on its maiden flight.
• 2004 - A GSLV launches the GSAT-3 satellite.
• 2011 - A Proton-M launches the Kosmos 2473 military communication satellite.