A total solar eclipse occurred on 11 August 1999 http://en.wikipedia.org/wiki/Solar_eclipse_of_August_11,_1999The solar eclipse of 11 August 1124 http://astronomy.activeboard.com/t58287359/the-solar-eclipse-of-11-august-1124/
The Mesoamerican Long Count calendar began on August 11, 3114 BCE in the Gregorian calendar.http://en.wikipedia.org/wiki/Mesoamerican_Long_Count_calendar
The first ascent of the Eiger was made on August 11, 1858.http://en.wikipedia.org/wiki/Eiger
Vostok 3 was launched on August 11, 1962http://en.wikipedia.org/wiki/Vostok_3The Olympus-1 satellite was hit by a meteoroid on 11 August 1993 and was put out of commissionhttp://en.wikipedia.org/wiki/Olympus-1Progress M-50 was launched by a Soyuz-U carrier rocket from the Baikonur Cosmodrome on 11 August 2004.http://en.wikipedia.org/wiki/Progress_M-50The Hypersonic Test Vehicle 2b was launched on August 11, 2011http://astronomy.activeboard.com/t44373988/hypersonic-test-vehicle/The PakSat-1R satellite successfully launched from the Xichang space centre at 16:15 GMT 11th August 2011.http://astronomy.activeboard.com/t21281362/paksat-1/
In 1835, Sir George Biddell Airy (1801-1892) began his 46 year reign as England's Astronomer Royal.http://en.wikipedia.org/wiki/George_Biddell_Airy
Frederick Wilford Sturckow (born August 11, 1961) is an Engineer, US Marine Corps officer and a NASA astronaut.http://en.wikipedia.org/wiki/Frederick_W._SturckowFrederick Drew (11 August 1836 - 28 October 1891), was an English geologist.http://en.wikipedia.org/wiki/Frederick_DrewPierre-Louis Lions (born August 11, 1956 in Grasse, Alpes-Maritimes) is a French mathematician. http://en.wikipedia.org/wiki/Pierre-Louis_LionsStephen Butterworth (1885 - 1958) was a British physicist who invented the Butterworth filterhttp://en.wikipedia.org/wiki/Stephen_ButterworthNils Mustelin (11 August 1931 - 28 April 2004) was a Finnish professor of physicshttp://en.wikipedia.org/wiki/Nils_MustelinEva Ahnert-Rohlfs (11 August 1912 - 9 March 1954) was a German astronomer. http://en.wikipedia.org/wiki/Eva_Ahnert-Rohlfs
The first recorded American use of "SOS" was in August of 1909.http://www.stormy.ca/perc/sos.html
NGC 6769 was discovered by British astronomer John Herschel on the 11th August 1836. http://astronomy.activeboard.com/t58287685/ngc-6769/NGC 6832 was discovered by British astronomer John Herschel on the 11th August 1831. http://astronomy.activeboard.com/t58287701/ngc-6832/
Extrasolar planet HD 147018 b was discovered on August 11, 2009http://en.wikipedia.org/wiki/HD_147018_bThe discovery of WASP-17b was announced on 11 August 2009http://en.wikipedia.org/wiki/WASP-17b
The Meteor of August 11, 1878http://astronomy.activeboard.com/t58287256/the-meteor-of-august-11-1878/
MeteoritesThe Bethlehem (H) meteorite fell in New York, USA, on the 11th August 1859.http://astronomy.activeboard.com/t44373367/bethlehem-meteorite/The Shytal (L6) meteorite fell in Dhaka, Bangladesh, on the 11th August 1863.http://astronomy.activeboard.com/t44373373/shytal-meteorite/The Higashi-koen (H6) meteorite fell in Kyushu, Japan, on the 11th August 1897.http://astronomy.activeboard.com/t44373385/higashi-koen-meteorite/The Breitscheid (H5) meteorite fell in Hessen, Germany, on the 11th August 1956.http://astronomy.activeboard.com/t44373394/breitscheid-meteorite/The Acapulco (Acapulcoite) meteorite fell in Guerrero, Mexico, on the 11th August 1976.http://astronomy.activeboard.com/t44373402/acapulco-meteorite/The Red Canyon Lake meteorite fell in Tuolumne Co., California, USA on the 11th August 2007http://astronomy.activeboard.com/t58287213/red-canyon-lake-meteorite/