* Astronomy

The Zenit-2 11F61 satellite was launched on the 11 December 1961
http://www.astronautix.com/craft/zenit2.htm

The Apollo 17 LM touched down on the lunar surface on December 11, 1972.
http://en.wikipedia.org/wiki/Apollo_17#Landing

The Intercosmos 14 satellite was launched on the 11 December 1975
http://nssdc.gsfc.nasa.gov/nmc/spacecraftDisplay.do?id=1975-115A

The Astra 1A was launched on the 11 December 1988
http://en.wikipedia.org/wiki/Astra_1A

The Hera missile THAAD flight test FTT-11 was on December 11, 2009
http://en.wikipedia.org/wiki/Hera_(rocket)

The third X-37 mission, USA-240, launched successfully on 11 December 2012
http://en.wikipedia.org/wiki/USA-240

The International Space Station was originally called Alfa
http://english.pravda.ru/science/tech/14-02-2008/104042-international_space_station-0/

On December 11, 1967, "Movin' with Nancy" showed the first US interracial kiss

Spoiler

The film "Caesar and Cleopatra" was first released in the United Kingdom on December 11, 1945.
https://en.wikipedia.org/wiki/Caesar_and_Cleopatra_(film)

On December 11, 2000, astronomers announced the discovery of a planet Epsilon Reticuli b
http://en.wikipedia.org/wiki/Epsilon_Reticuli

Comet C/1945 X1 was discovered photographically on the 11th December 1945 by D. du Toit at the Harvard College Observatory's Boyden Station near Bloemfontein, South Africa
http://astronomy.activeboard.com/t60327190/comet-c1945-x1-du-toit/

On December 11, 1741, a fire-ball appeared soon after noon-day, and the sun shining, but few people saw it, and they could only guess at its course; which, however, was observed to be from north-west by north, to south and by south, and right over Littleborne from Westbere, and towards Ratling, near which place lord Cowper, who was hunting, heard but one explosion (for there were two); the other most probably happened at such a distance, as to be in one with that so near him. Mr. Gostling, of the Mint yard, who gave the account of it to the secretary of the royal society, says, that he found his house violently shaken for some seconds of time, as if several loaded carriages had been driving against the walls of it, and heard a noise at the same time, which he took for thunder, yet of an uncommon sound; though he thought thunder, which could shake at that rate, would have been much louder, therefore he concluded it to be an earthquake; the sky, he found, was cloudy, but nothing like a thunder cloud in view, and there was a shower of rain from the eastward presently after, the coldest that he ever felt.
http://www.british-history.ac.uk/report.aspx?compid=63657