Portal:Spaceflight/On This Day/23 December

• 1969 - A Tsyklon-2 launches the Kosmos 316 satellite.
• 1969 - A Voskhod launches the Kosmos 317 satellite.
• 1977 - A Kosmos-3M launches the Kosmos 971 satellite.
• 1978 - A Vostok-2M launches the Kosmos 1066 satellites.
• 1980 - A Kosmos-3M launches eight Strela satellites.
• 1981 - A Molniya-M launches a Molniya-1 satellite.
• 1982 - A Soyuz-U2 launches the Kosmos 1425 satellite.
• 1987 - A Kosmos-3M launches the Kosmos 1904 satellite.
• 1988 - A Tsyklon-3 launches the Kosmos 1985 satellite.
• 1997 - A Pegasus-XL launches eight Orbcomm satellites.
• 2004 - A Soyuz-U launches the Progress M-51 spacecraft to resupply the ISS.
• 2007 - A Soyuz-U launches the Progress M-62 spacecraft to resupply the ISS.
• 2008 - A Long March 3A launches the Feng Yun 2E satellite.
• 2011 - A Soyuz-2.1b/Fregat fails to launch the Meridian 5 satellite.