The Sun enters the zodiac sign of Scorpio on the 22nd/23rd OctoberMole Day is an unofficial holiday celebrated among chemists on October 23http://astronomy.activeboard.com/t45731617/mole-day/Aberdeen Grammar School, Skene Street, was officially opened on 23 October 1863http://en.wikipedia.org/wiki/Aberdeen_Grammar_SchoolOn 23 October 1998, the Swiss watchmaking company, Swatch, introduced a decimal time called Swatch Internet Timehttp://en.wikipedia.org/wiki/Swatch_Internet_TimeThe Battle of Philippi was the final battle in the Wars of the Second Triumviratehttp://en.wikipedia.org/wiki/Battle_of_PhilippiThe Battle of Edgehill (or Edge Hill) was the first pitched battle of the First English Civil Warhttp://en.wikipedia.org/wiki/Battle_of_EdgehillThe Chuetsu Earthquakes occurred on Saturday, October 23, 2004http://en.wikipedia.org/wiki/2004_Ch%C5%ABetsu_earthquakeThe Van earthquake struck eastern Turkey on Sunday, 23 October 2011http://en.wikipedia.org/wiki/2011_Van_earthquake
ROSAT re-entered the Earth's atmosphere on 23 October 2011 http://en.wikipedia.org/wiki/ROSATSpace shuttle mission STS-120 was launched on 23 October 2007http://en.wikipedia.org/wiki/STS-120
People
On 23 October 1906 Santos-Dumont, flew the Oiseau de proie (French for "bird of prey")http://en.wikipedia.org/wiki/Alberto_Santos-DumontFriederich Wilhelm Gustav Spörer (23 October 1822 - 7 July 1895) was a German astronomerhttp://en.wikipedia.org/wiki/Gustav_Sp%C3%B6rerZhang Daqing (born October 23, 1969) is a Chinese amateur astronomerhttp://en.wikipedia.org/wiki/Zhang_DaqingErnst Julius Opik (23 October 1893 - 10 September 1985) was a noted Estonian astronomerhttp://en.wikipedia.org/wiki/Ernst_%C3%96pikEmma Vyssotsky (October 23, 1894 - May, 1975) was an American astronomer.http://en.wikipedia.org/wiki/Emma_VyssotskyGaspare Ferrari Stanislaus (23 October 1834 - 20 June 1903) was an Italian mathematician.http://it.wikipedia.org/wiki/Gaspare_Stanislao_FerrariIlya Mikhailovich Frank (23 October 1908 - 22 June 1990) was a Soviet winner of the Nobel Prize for Physicshttp://en.wikipedia.org/wiki/Ilya_Mikhaylovich_FrankWilliam David Coolidge (October 23, 1873 - February 3, 1975) was an American physicisthttp://en.wikipedia.org/wiki/William_D._CoolidgeFelix Bloch (October 23, 1905 - September 10, 1983) was a Swiss physicisthttp://en.wikipedia.org/wiki/Felix_BlochMarcus Vipsanius Agrippa (c. 23 October or November 64/63 BC - 12 BC) was a Roman statesmanhttp://en.wikipedia.org/wiki/Marcus_Vipsanius_AgrippaTetsuya Fujita (October 23, 1920 - November 19, 1998) was a severe storms researcherhttp://en.wikipedia.org/wiki/Ted_Fujita
The Smurfs was and first introduced as a series of comic strips on October 23, 1958.http://en.wikipedia.org/wiki/The_Smurfs
NGC Discovered
NGC 534 is a magnitude +13.3 barred spiral galaxy discovered by John Herschel on the 23rd October 1835. http://astronomy.activeboard.com/t58841130/ngc-534/NGC 544 is a magnitude +13.3 elliptical galaxy discovered by John Herschel on the 23rd October 1835. http://astronomy.activeboard.com/t58841121/ngc-544/NGC 546 is a magnitude +13.7 barred spiral galaxy discovered by John Herschel on the 23rd October 1835. http://astronomy.activeboard.com/t58841116/ngc-546/NGC 577 is a magnitude +12.9 barred spiral galaxy discovered by Aaron Nichols Skinner on the 23rd October 1867.http://astronomy.activeboard.com/t58841108/ngc-577/NGC 7445 is a magnitude +14.6 elliptical galaxy discovered by Edouard Stephan on the 23rd October 1878.http://astronomy.activeboard.com/t58841099/ngc-7445/NGC 7446 is a magnitude +13.8 elliptical galaxy discovered by Edouard Stephan on the 23rd October 1878.http://astronomy.activeboard.com/t58841089/ngc-7446/NGC 7449 is a magnitude +14.0 elliptical galaxy discovered by Edouard Stephan on the 23rd October 1878.http://astronomy.activeboard.com/t58841078/ngc-7449/NGC 7589 is a magnitude +14.1 spiral galaxy discovered by Albert Marth on the 23rd October 1864.http://astronomy.activeboard.com/t58841075/ngc-7589/NGC 7597 is a magnitude +14.0 face-on spiral galaxy discovered by Albert Marth on the 23rd October 1864.http://astronomy.activeboard.com/t58841067/ngc-7597/NGC 7672 is a magnitude +13.9 face-on spiral galaxy discovered by R. J. Mitchell on the 23rd October 1857.http://astronomy.activeboard.com/t58841059/ngc-7672/NGC 7692 is a magnitude +14.8 irregular galaxy discovered by George Phillips Bond on the 23rd October 1848.http://astronomy.activeboard.com/t58841051/ngc-7692/NGC 7818 is a magnitude +14.1 spiral galaxy discovered by Lewis A. Swift on the 23rd October 1886.http://astronomy.activeboard.com/t58841038/ngc-7818/
On 23 October 1886 Isaac Roberts started to photograph the Pleiades http://books.google.co.uk/books?id=wyWjVWYWoO8C&pg=PA545&lpg=PA545#v=onepage&q&f=falseSupernova 1996bo: No supernova had ever been discovered from the UK until 23 October 1996http://books.google.co.uk/books?id=woJKq6o1zAMC&pg=PT172&lpg=PT172#v=onepage&q&f=falseHD 196885 Ab was discovered on October 23, 2007.http://en.wikipedia.org/wiki/HD_196885_AbAn outburst of Comet 17P/Holmes took place from October 23 to 24, 2007http://en.wikipedia.org/wiki/Comet_Holmes
MeteoritesThe Po-wang Chen (LL) meteorite fell in Anhui, China, on the 23rd October 1933.http://astronomy.activeboard.com/t45731542/po-wang-chen-meteorite/The Kiffa (H5) meteorite fell in Assaba, Mauritania, on the 23rd October 1970.http://astronomy.activeboard.com/t55327254/kiffa-meteorite/