Total Eclipse of the Sun: 1840 August 27http://astro.ukho.gov.uk/eclipse/0411840/
The first recorded observation of a Bishop's Ring was after the Krakatoa eruption of August 27, 1883.http://en.wikipedia.org/wiki/Bishop%27s_Ring
Volturnalia is the Roman festival on August 27 dedicated to Volturnus, 'god of the waters'http://en.wikipedia.org/wiki/Volturnalia
The Battle of Plataea in 479 BC was the final land battle during the second Persian invasion of Greece. http://astronomy.activeboard.com/t50571748/battle-of-plataea/Peloponnesian War: The 413 BCE lunar eclipse caused panic in Athens' fleethttp://astronomy.activeboard.com/t44667536/413-bce-lunar-eclipse/The Anglo-Zanzibar War was fought on 27 August 1896. http://en.wikipedia.org/wiki/Anglo-Zanzibar_War
Gallium was discovered spectroscopically by Paul Emile Lecoq de Boisbaudran in 1875 http://en.wikipedia.org/wiki/Gallium#HistoryOperation Argus was a series of nuclear weapons tests and missile tests secretly conducted during August and September 1958http://en.wikipedia.org/wiki/Operation_ArgusThe Calder Hall nuclear power station was first connection to the grid was on 27 August 1956http://astronomy.activeboard.com/t44667345/calder-hall-nuclear-power-station/
The foundation stone of Glashütte Observatory was set on 27 August 1906.http://en.wikipedia.org/wiki/Glash%C3%BCtte_ObservatoryThe SommersBausch Observatory was dedicated on August 27, 1953http://en.wikipedia.org/wiki/Sommers%E2%80%93Bausch_ObservatoryThe Mingo Creek Park Observatory was dedicated on August 27, 2005http://en.wikipedia.org/wiki/Amateur_Astronomers_Association_of_Pittsburgh#Mingo_Creek_Park_Observatory
The Manned Spacecraft Centre was renamed in honour of Lyndon Johnson, with dedication ceremonies on August 27, 1973http://en.wikipedia.org/wiki/Lyndon_B._Johnson_Space_Center
The first flight of the Heinkel He 178 was in 1939http://astronomy.activeboard.com/t44667207/heinkel-he-178/
Mariner 2, a space probe to Venus, was launched in 1962.
Sergei Konstantinovich Krikalev (born August 27, 1958) is a Russian cosmonaut http://en.wikipedia.org/wiki/Sergei_KrikalevYury Vasilyevich Malyshev (August 27, 1941 - November 8, 1999) was Commander of Soyuz T-2 and Soyuz T-11http://en.wikipedia.org/wiki/Yury_Vasilyevich_MalyshevNorman Foster Ramsey, Jr. (August 27, 1915 - November 4, 2011) was an American physicisthttp://en.wikipedia.org/wiki/Norman_Foster_Ramsey,_Jr.Giuseppe Peano (27 August 1858 - 20 April 1932) was an Italian mathematicianhttp://en.wikipedia.org/wiki/Guiseppe_PeanoCarl Bosch (27 August 1874 - 26 April 1940) was a German chemist and engineerhttp://en.wikipedia.org/wiki/Carl_Bosch#LegacyKenneth Charles Freeman (born 27 August 1940) is an Australian astronomerhttp://en.wikipedia.org/wiki/Ken_Freeman_(astronomer)Audrey C. Delsanti (born 27 August 1976) is a French astronomerhttp://en.wikipedia.org/wiki/Audrey_C._DelsantiJohann Jakob Huber (27 August 1733 - 21 August 1798) was a Swiss astronomer.http://en.wikipedia.org/wiki/Johann_Jakob_HuberFerdinand Augustin Haller von Hallerstein (27 August 1703 - 29 October 1774) was a Jesuit missionary in Chinahttp://en.wikipedia.org/wiki/Ferdinand_Augustin_HallersteinEdmund Neison (27 August 1849 - 1940) set up an observatory in Durban, Natal Province.http://en.wikipedia.org/wiki/Edmund_Neville_Nevill
Mary Poppins premiered in Los Angeles on August 27, 1964http://en.wikipedia.org/wiki/Mary_Poppins_(film)
Google Sky was created on August 27, 2007http://en.wikipedia.org/wiki/Google_Sky
NGC 113 was discovered by German astronomer Wilhelm Tempel on the 27th August 1876.http://astronomy.activeboard.com/t58411435/ngc-113/M110 (NGC 205) was independently discovered by Caroline Herschel on August 27, 1783.http://astronomy.activeboard.com/t8322343/messier-110/NGC 721 was discovered by German astronomer Heinrich Louis d'Arrest on the 27th August 1862.http://astronomy.activeboard.com/t58411429/ngc-721/NGC 7363 was discovered by German astronomer Heinrich Louis d'Arrest on the 27th August 1865.http://astronomy.activeboard.com/t58411422/ngc-7363/