NGC Discovered
NGC 687 is an elliptical galaxy discovered by William Herschel on the 21st September 1786.http://astronomy.activeboard.com/t58600558/ngc-687/NGC 703 is an elliptical galaxy discovered by William Herschel on the 21st September 1786.http://astronomy.activeboard.com/t58600544/ngc-703/NGC 704 is a spiral galaxy discovered by William Herschel on the 21st September 1786.http://astronomy.activeboard.com/t58600532/ngc-704/NGC 705 is a spiral galaxy discovered by William Herschel on the 21st September 1786.http://astronomy.activeboard.com/t58600517/ngc-705/NGC 708 is an elliptical galaxy discovered by William Herschel on the 21st September 1786.http://astronomy.activeboard.com/t58600505/ngc-708/
NGC 949 was first discovered by Sir William Herschel on September 21, 1786http://astronomy.activeboard.com/t60164966/ngc-949/NGC 7086 is an open star cluster discovered by William Herschel on the 21st September 1788.http://astronomy.activeboard.com/t58600479/ngc-7086/NGC 7095 is a spiral galaxy discovered by John Herschel on the 21st September 1837. http://astronomy.activeboard.com/t58600465/ngc-7095/NGC 7611 is a barred spiral galaxy discovered by Heinrich Louis d'Arrest on the 21st September 1862.http://astronomy.activeboard.com/t58600411/ngc-7611/NGC 7687 is a spiral galaxy discovered by Heinrich Louis d'Arrest on the 21st September 1862.http://astronomy.activeboard.com/t58600383/ngc-7687/
A total solar eclipse occurred on September 21, 1922.http://astronomy.activeboard.com/t50880649/total-solar-eclipse-september-21-1922/The Oppau explosion occurred on September 21, 1921http://astronomy.activeboard.com/t45099816/the-oppau-explosion/The Battle of Arnemuiden is a naval battle fought on 23 September 1338http://en.wikipedia.org/wiki/Battle_of_ArnemuidenMururoa atoll was officially established as a french nuclear test site on September 21, 1962http://en.wikipedia.org/wiki/MoruroaThe Galileo spacecraft impacted planet Jupiter on September 21, 2003http://en.wikipedia.org/wiki/Galileo_probe#End_of_mission_and_deorbitOn September 21, 2001, a Taurus XL rocket failed during launch.http://www.theozonehole.com/quicktoms.htmDeep Space 1 flyby of Comet Borrelly in 2001.http://astronomy.activeboard.com/t45744692/deep-space-1/Mariner 10 flew by Mercury again on September 21, 1974http://en.wikipedia.org/wiki/Mariner_10#Second_Mercury_flybyThe first flight of the XB-70 Valkyrie was on the 21st September 1964http://en.wikipedia.org/wiki/XB-70_ValkyrieThe first flight of the B-29 Superfortress was on the 21st September 1942http://en.wikipedia.org/wiki/B-29_SuperfortressOn 21 September 1926, René Fonck crashed on takeoff for the transatlantic Orteig Prizehttp://en.wikipedia.org/wiki/Rene_Fonck#After_the_war
People
Max Immelmann (21 September 1890 - 18 June 1916) was a World War I flying acehttp://en.wikipedia.org/wiki/Max_ImmelmannBjarni V. Tryggvason (September 21, 1945) is an Icelandic-born former NRC/CSA astronauthttp://en.wikipedia.org/wiki/Bjarni_TryggvasonRichard James Hieb (September 21, 1955) is a former NASA astronauthttp://en.wikipedia.org/wiki/Richard_HiebJohn William Gofman (September 21, 1918 - August 15, 2007) was an American scientisthttp://en.wikipedia.org/wiki/John_GofmanPhyllis Nicolson (21 September 1917 - 6 October 1968) was a British mathematicianhttp://en.wikipedia.org/wiki/Phyllis_NicolsonHeike Kamerlingh Onnes (21 September 1853 - 21 February 1926) was a Dutch physicisthttp://en.wikipedia.org/wiki/Heike_Kamerlingh_OnnesDonald Arthur Glaser (born September 21, 1926 - February 28, 2013) was an American physicisthttp://astronomy.activeboard.com/t45099644/donald-arthur-glaser/Arthur Edwin Covington (21 September 1913 - 17 March 2001) was a Canadian physicisthttp://en.wikipedia.org/wiki/Arthur_CovingtonJohn Loudon McAdam (21 September 1756 - 26 November 1836) was a Scottish engineerhttp://en.wikipedia.org/wiki/John_MacAdamArthur Rambaut (21 September 1859 - 14 October 1923) was an Irish astronomerhttp://www.nature.com/nature/journal/v112/n2817/abs/112628b0.htmlBernhard Dawson (September 21, 1890 - June 18, 1960) was a U.S.-born Argentine astronomerhttp://en.wikipedia.org/wiki/Bernhard_DawsonChristian Ludwig Ideler (21 September 1766 - 10 August 1846) was a German chronologisthttp://en.wikipedia.org/wiki/Christian_Ludwig_IdelerGirolamo Savonarola (1452-1498) was an Italian Dominican friarhttp://en.wikipedia.org/wiki/Girolamo_Savonarola
Gustav Theodore Holst (21 September 1874 - 25 May 1934) was an English composerhttp://en.wikipedia.org/wiki/Gustav_HolstHerbert George "H. G." Wells (21 September 1866 - 13 August 1946) was an English writerhttp://en.wikipedia.org/wiki/H._G._Wells
The Hobbit was published on 21 September 1937http://astronomy.activeboard.com/t45099650/the-hobbit/
Asteroid (149) Medusa was discovered on September 21, 1875http://en.wikipedia.org/wiki/149_Medusa
Asteroid (269) Justitia was discovered by Johann Palisa on September 21, 1887 in Vienna.https://en.wikipedia.org/wiki/269_JustitiaComet C/2012 S1 ISON or Comet NevskiNovichonok, was discovered on 21 September 2012http://en.wikipedia.org/wiki/C/2012_S1The Great Fireball of 21st September 2012http://www.bbc.co.uk/news/uk-19683687
Meteorites
The Muddoor (L5) meteorite fell in Karnataka, India, on the 21st September 1865.http://astronomy.activeboard.com/t45099869/muddoor-meteorite/
The Rio Negro (L4) meteorite fell in Parana, Brazil, on the 21st September 1934.http://astronomy.activeboard.com/t45099876/rio-negro-meteorite/
The Beddgelert (H5) meteorite fell in Wales, UK, on the 21st September 1949.http://astronomy.activeboard.com/t30956406/beddgelert-meteorite/
The Akaba (L6) meteorite fell in Ma'an, Jordan, on the 21st September 1949.http://astronomy.activeboard.com/t45099892/akaba-meteorite/