* Astronomy

The AngloZulu War was fought in 1879 between the British Empire and the Zulu Kingdom.
http://astronomy.activeboard.com/t52215668/anglozulu-war/

The 1693 Sicily earthquake struck on January 11, 1693
http://astronomy.activeboard.com/t47220789/1693-sicily-earthquake/

Soyuz 17, with cosmonauts Georgi Grechko and Aleksei Gubarev was launched on 11 January 1975.
http://en.wikipedia.org/wiki/Soyuz_17

The Hindu: PSLV-C7 launch a success January 11, 2007
http://en.wikipedia.org/wiki/Space_Capsule_Recovery_Experiment

STS-72 was launched on 11 January 1996
http://astronomy.activeboard.com/t40425495/sts-72-mission/

Telstar 401 was rendered inoperable by a magnetic storm in 1997
http://en.wikipedia.org/wiki/Telstar_401

A spent 49-ton Saturn V S-II stage which made an uncontrolled reentry on January 11, 1975. 
http://en.wikipedia.org/wiki/Skylab#After_departure

On January 11, 2007 China destroyed the Fengyun-1C satellite in a test of an anti-satellite missile.
http://en.wikipedia.org/wiki/Fengyun

On January 11, 1935, Amelia Mary Earhart became the first person to fly solo from Hawaii to California.
http://en.wikipedia.org/wiki/Amelia_Earhart#Other_solo_flights

NGC 2064 was discovered by Heinrich Louis d'Arrest on the 11th January 1864.
http://astronomy.activeboard.com/t8742217/messier-78/

NGC 2132 was discovered by John Herschel on the 11th January 1836.
http://astronomy.activeboard.com/t56223201/ngc-2132/

NGC 2545 was discovered by William Herschel on the 11th January 1787.
http://astronomy.activeboard.com/t56223152/ngc-2545/

NGC 2595 was discovered by William Herschel on the 11th January 1787.
http://astronomy.activeboard.com/t56223132/ngc-2595/

NGC 2890 was discovered by Francis Preserved Leavenworth on the 11th January 1886.
http://astronomy.activeboard.com/t56223110/ngc-2890/

On 11 January CE 1077, in the sun were black spots as large as plums. They disappeared on 22. 
http://arxiv.org/ftp/arxiv/papers/1506/1506.03715.pdf

The Huge Large Quasar Group, (Huge-LQG, also called U1.27) is a possible structure or pseudo-structure of 73 quasars, referred to as a large quasar group, that measures about 4 billion light-years across. 
http://en.wikipedia.org/wiki/Huge-LQG

BeppoSAX detected a gamma-ray burst on January 11, 1997
http://en.wikipedia.org/wiki/History_of_gamma-ray_burst_research#Observations_and_analysis

In 1844 the German astronomer Friedrich Bessel deduced from changes in the proper motion of Sirius that it had an unseen companion. Nearly two decades later, on January 31, 1862, American telescope-maker and astronomer Alvan Graham Clark first observed the faint companion, which is now called Sirius B, or affectionately "the Pup".
https://en.wikipedia.org/wiki/Sirius#Sirius_B

On January 11, 2007, the California and Carnegie Planet Search team found one planet orbiting HD 75898
http://en.wikipedia.org/wiki/HD_75898

On January 11, 2007, the California and Carnegie Planet Search team found a planet orbiting HD 5319
http://en.wikipedia.org/wiki/HD_5319

Asteroid (3185) Clintford, mag 19, transited Saturn for observers in North American on the 11th January 2014. 
http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=3185;orb=1

William Herschel discovered the satellites of Uranus, Titania and Oberon, on January 11, 1787.
http://astronomy.activeboard.com/t21803494/william-herschel/

The Denver meteor of 1998
http://astronomy.activeboard.com/t56218653/denver-meteor-1998/