* Astronomy

Blobrana · L

RE: April 20th

Blobrana · L

Vädersolstavlan is painting depicting a halo display observed over Stockholm on April 20, 1535
http://astronomy.activeboard.com/t48802194/the-sun-dog-painting/

Blobrana · L

Ridván is a twelve-day festival in the Bahá'í Faith
http://en.wikipedia.org/wiki/Ridv%C3%A1n

April 20 (4/20 in U.S. date notation) has evolved into a counterculture holiday
http://en.wikipedia.org/wiki/420_%28cannabis_culture%29

The Secchi disk was created in 1865
http://astronomy.activeboard.com/t42399365/the-secchi-disk/

The Deepwater Horizon drilling rig explosion refers to the April 20, 2010 explosion
http://astronomy.activeboard.com/t28362628/deepwater-horizon-oil-spill/

Blobrana · L

Sapienza University of Rome was founded as La Sapienza in 1303
http://astronomy.activeboard.com/t42399313/sapienza-university-of-rome/

Blobrana · L

Donald Roy Pettit (born April 20, 1955) is an American chemical engineer and a NASA astronaut.
http://astronomy.activeboard.com/t48802264/donald-roy-pettit/

George Ernest Kalmus, CBE, FRS (born 21 April 1935) is a British particle physicist.
http://en.wikipedia.org/wiki/George_Kalmus

Kai Manne Börje Siegbahn (20 April 1918 - 20 July 2007) was a Swedish physicist.
https://en.wikipedia.org/wiki/Kai_Siegbahn

Gerald Stanley Hawkins (1928-2003) was an English astronomer famous for his work in archaeoastronomy
http://en.wikipedia.org/wiki/Gerald_S._Hawkins

Albrecht Otto Johannes Unsöld (20 April 1905 - 23 September 1995) was a German astrophysicist
http://en.wikipedia.org/wiki/Albrecht_Uns%C3%B6ld

Vincenzo Cerulli (20 April 1859 - 30 May 1927) was an Italian astronomer who owned a private observatory in Teramo
http://en.wikipedia.org/wiki/Vincenzo_Cerulli

George Hosato Takei (April 20, 1937) is an American actor, director, author, and activist, probably most widely known for his role as Hikaru Sulu, helmsman of the USS Enterprise
http://en.wikipedia.org/wiki/George_Takei

Blobrana · L

NGC 4118 was discovered R. J. Mitchell on the 20th April 1857.
http://astronomy.activeboard.com/t57346168/ngc-4118/

NGC 4396 was discovered by Heinrich Louis dArrest on the 20th April 1865.
http://astronomy.activeboard.com/t57346118/ngc-4396/

Blobrana · L

Asteroid 508 Princetonia was discovered by Raymond Smith Dugan at Heidelberg
http://en.wikipedia.org/wiki/508_Princetonia

Asteroid 532 Herculina was discovered on April 20, 1904, by Max Wolf
http://en.wikipedia.org/wiki/532_Herculina

The Comet of 1702 (C/1702 H1) made a close approach to the Earth (0.0435 AU) on the 20th April 1702
http://en.wikipedia.org/wiki/C/1702_H1

20 April 1910 - The return of Halley's Comet
http://en.wikipedia.org/wiki/Halley%27s_Comet

Blobrana · L

Meteorites

The Rowton (Iron) meteorite fell in England, UK, on the 20th April, 1876.
http://astronomy.activeboard.com/t48802072/rowton-meteorite/

The Pitts (Iron) meteorite fell in Georgia, USA, on the 20th April, 1921.
http://astronomy.activeboard.com/t48802091/pitts-meteorite/

The Hedeskoga (H5) meteorite fell in Malmohus, Sweden, on the 20th April, 1922.
http://astronomy.activeboard.com/t48802107/hedeskoga-meteorite/

The Boriskino (CM2) meteorite fell in Orenburgskaya oblast', Russia, on the 20th April, 1930.
http://astronomy.activeboard.com/t48802118/boriskino-meteorite/