The Sun appears in the constellation Gemini from (around) June 20 to July 20. http://en.wikipedia.org/wiki/Gemini_(constellation)#AstrologyOn June 20, 1955, a total solar eclipse of 7min 8sec duration was visible in Southeast Asia.http://en.wikipedia.org/wiki/Solar_eclipse_of_June_20,_1955The first Starmus Festival took place June 20 - 25, 2011, on Tenerife, and La Palma, Canary Islands.http://en.wikipedia.org/wiki/Starmus_FestivalThe Roman festival of Summanus is on the 20th June.http://en.wikipedia.org/wiki/Summanus
On June 20, 1985 Ohio declared the Ordovician trilobite Isotelus maximus ss the Ohio state fossil.http://en.wikipedia.org/wiki/Paleontology_in_Ohio#Scientific_researchOn June 20, 1833 a section of the Garnock river bed collapsed into mineworkings. http://en.wikipedia.org/wiki/River_Garnock#A_mining_disasterThe Black Hole of Calcutta was a small dungeon in the old Fort William in Calcutta, Indiahttp://en.wikipedia.org/wiki/Black_Hole_of_Calcutta#In_astronomyAccording to Hong-Yee Chiu, the Black Hole of Calcutta was the inspiration for the term 'black hole'http://www.marciabartusiak.com/uploads/8/5/8/9/8589314/celestial_lockup.pdf (PDF)Samuel Morse received the patent #1647 for the telegraph in 1840 STOPhttp://www.google.com/patents/US1647?dq=1647#v=onepage&q=1647&f=falseThe Moscow-Washington hotline was established on June 20, 1963http://en.wikipedia.org/wiki/Moscow-Washington_hotline
Aukstojas Hill was 'baptised' on June 20, 2005, during an unofficial ceremony.http://en.wikipedia.org/wiki/Auk%C5%A1tojas_HillOn 20 June 1898 the Heidelberg Observatory) was ceremonially inaugurated http://en.wikipedia.org/wiki/Mannheim_Observatory#The_Mountain_Observatory_at_HeidelbergThe Lovell Telescope was tilted under power for the first time on 20 June 1957http://en.wikipedia.org/wiki/Lovell_TelescopeConstruction of the Griffith Observatory started on 20 June 1933http://astronomy.activeboard.com/t6932332/griffith-park-observatory/
Chhatrapati Shivaji Terminus railway station opened on the 20th June 1887http://en.wikipedia.org/wiki/Chhatrapati_Shivaji_Terminus#Opening_and_growth_as_Victoria_TerminusOn June 20, 1819, the SS Savannah sidewheel steamer crossed the Atlantichttp://en.wikipedia.org/wiki/SS_Savannah#Historic_transatlantic_voyage
Space Shuttle Columbia, STS-78, was successfully launched on 20 June 1992http://en.wikipedia.org/wiki/STS-78Foton-M2 was launched on 20 June 2005http://astronomy.activeboard.com/t3099910/foton-m2-mission/The Jason-2 satellite was launched on 20 June 2008http://astronomy.activeboard.com/t7243572/jason-2-satellite/The Zhongxing-10 (ChinaSat 10) satellite was launched at 16:13 UT, 20th June 2011http://astronomy.activeboard.com/t43474967/zhongxing-10/The NROL-38 satellite was launched on June 20, 2012http://astronomy.activeboard.com/t49619389/nrol-38-satellite/
Dr. Ulf Dietrich Merbold (June 20, 1941) is the first West German citizen and second German native to fly in spacehttp://en.wikipedia.org/wiki/Ulf_MerboldColonel Gary Eugene Payton, USAF, (born 20 June 1948) is a former American astronaut.http://en.wikipedia.org/wiki/Gary_Payton_(astronaut)James Frederick Buchli (born June 20, 1945) is a former NASA astronauthttp://en.wikipedia.org/wiki/James_BuchliIlan Ramon (June 20, 1954 - February 1, 2003) was a fighter pilot in the Israeli Air Forcehttp://astronomy.activeboard.com/t43468597/ilan-ramon-1954-2003/
Martin Landau (June 20, 1928 - July 15, 2017) was an American film and television actor.https://en.wikipedia.org/wiki/Martin_LandauWilliam Ashley Bradfield (20 June 1927 - 9 June 2014) was a prolific amateur discoverer of comets.http://en.wikipedia.org/wiki/William_A._BradfieldJohn Stefanos Paraskevopoulos (June 20, 1889 - March 15, 1961) was a Greek/South African astronomer.http://en.wikipedia.org/wiki/John_S._ParaskevopoulosMary R. Calvert (June 20, 1884 - June 1974) was an American astronomer. http://en.wikipedia.org/wiki/Mary_R._Calvert
Edgar Rice Burroughs finished the science fantasy novel 'Thuvia, Maid of Mars' on June 20, 1914http://en.wikipedia.org/wiki/Thuvia,_Maid_of_MarsAlternative 3 is a television programme, broadcast once only in the United Kingdom in 1977.http://en.wikipedia.org/wiki/Alternative_3
NGC 6051 was discovered by French astronomer Edouard Stephan on the 20th June 1881.http://astronomy.activeboard.com/t57876406/ngc-6051/NGC 6062 was discovered by French astronomer Edouard Stephan on the 20th June 1884.http://astronomy.activeboard.com/t57876399/ngc-6062/Messier 23 was discovered by French astronomer Charles Messier on the 20th June 1764. http://astronomy.activeboard.com/t57876396/messier-23/Messier 24 was discovered by French astronomer Charles Messier on the 20th June 1764. http://astronomy.activeboard.com/t47752321/messier-24/Messier 26 was discovered by French astronomer Charles Messier on the 20th June 1764. http://astronomy.activeboard.com/t57876361/messier-26/NGC 6502 was discovered by British astronomer John Herschel on the 20th June 1835. http://astronomy.activeboard.com/t57876327/ngc-6502/NGC 6545 was discovered by British astronomer John Herschel on the 20th June 1835. http://astronomy.activeboard.com/t57876319/ngc-6545/NGC 6776 was discovered by British astronomer John Herschel on the 20th June 1835. http://astronomy.activeboard.com/t57876305/ngc-6776/NGC 7226 was discovered by American astronomer Edward Singleton Holden on the 20th June 1881.http://astronomy.activeboard.com/t57876292/ngc-7226/
Nova 1670 Vulpeculae was discovered in 1670http://astronomy.activeboard.com/t54094119/nova-1670-vulpeculae/Supernova 2009gj was discovered on June 20, 2009http://astronomy.activeboard.com/t28869718/supernova-2009gj/Asteroid (404) Arsinoë was discovered by Auguste Charlois on June 20, 1895, in Nicehttp://en.wikipedia.org/wiki/404_Arsino%C3%ABAsteroid (5261) Eureka was discovered at Palomar Observatory on June 20, 1990http://astronomy.activeboard.com/t12719498/mars-trojan/
On June 20, 1943, a United States Army Air Force plane took a photograph of Pingualuit craterhttp://en.wikipedia.org/wiki/Pingualuit_crater#DiscoveryNaracoorte 20 June 1921 meteorhttp://astronomy.activeboard.com/t54116136/naracoorte-20-june-1921-meteor/Ophiuchid meteor shower peakhttp://astronomy.activeboard.com/t43468548/ophiuchids-meteor-shower/
MeteoritesThe Pnompehn (L6) meteorite fell in Phnum Penh, Cambodia, on the 20-30th June, 1868http://astronomy.activeboard.com/t43468629/pnompehn-meteorite/The Lancon (H6 Chondrite) meteorite fell in Bouches du Rhone, France, on the 20th June, 1879. http://astronomy.activeboard.com/t43468636/lancon-meteorite/The St. Mary's County (LL3.3 Chondrite) meteorite fell in Maryland, USA, on the 20th June, 1919. http://astronomy.activeboard.com/t43468655/st-marys-county-meteorite/The Renca (L5 Chondrite) meteorite fell in San Luis, Argentina, on the 20th June, 1925. http://astronomy.activeboard.com/t43468663/renca-meteorite/The Madiun (L6 Chondrite) meteorite fell in Jawa Timur, Indonesia, on the 20th June, 1935. http://astronomy.activeboard.com/t43468668/madiun-meteorite/The Piplia Kalan (Eucrite-mmict) meteorite fell in Rajasthan, India, on the 20th June, 1996.http://astronomy.activeboard.com/t43468687/piplia-kalan-meteorite/The Kunya-Urgench (H5) meteorite fell in Dashkhowus Velayat, Turkmenistan, on the 20th June, 1998. http://astronomy.activeboard.com/t31007148/kunya-urgench-meteorite/