* Astronomy

Total solar eclipse, June 6, 346
http://eclipse.gsfc.nasa.gov/SEhistory/SEplot/SE0346Jun06T.pdf (PDF)

The Solar Eclipse of June 6, 1891
http://articles.adsabs.harvard.edu//full/1891PASP....3..175H/0000175.000.html

Mikhail Lomonosov hypothesized the existence of Venus atmosphere based on his observation of the 1761 Venus transit
http://en.wikipedia.org/wiki/Mikhail_Lomonosov#Astronomer

On 6 June 1979, the world drilling depth record of 9,583 m was broken.
http://en.wikipedia.org/wiki/Kola_Superdeep_Borehole#Drilling

The first concrete was poured into the Hoover Dam on June 6, 1933
http://en.wikipedia.org/wiki/Hoover_Dam#Concrete

On 6 June 793 AD a raiding party of Vikings arrived on the shores of Northeast England.
http://en.wikipedia.org/wiki/North_East_England#Geography_and_early_history

Operation Neptune, were the landing operations on 6 June 1944 (termed D-Day)
http://en.wikipedia.org/wiki/Operation_Neptune

Jay Clark Buckey, Jr. (born June 6, 1956,) is an American physician and astronaut
http://en.wikipedia.org/wiki/Jay_C._Buckey

David Randolph Scott (born June 6, 1932) is a former NASA astronaut
http://en.wikipedia.org/wiki/David_Scott

Robert Falcon Scott CVO (6 June 1868 - c. 29 March 1912) was a Royal Navy officer and explorer
http://en.wikipedia.org/wiki/Robert_Falcon_Scott

Antoni Boleslaw Dobrowolski (6 June 1872 - 27 April 1954) was a Polish geophysicist, meteorologist and explorer.
http://en.wikipedia.org/wiki/Antoni_Boles%C5%82aw_Dobrowolski

Fitzhugh L. "Fitz" Fulton, Jr. (June 6, 1925 - February 4, 2015) was a civilian research pilot
http://en.wikipedia.org/wiki/Fitzhugh_L._Fulton

Anna Airy (1882 - 1964) was a British oil painter, pastel artist and etcher. She was one of the first women officially commissioned as a war artist
http://en.wikipedia.org/wiki/Anna_Airy

Karl Ferdinand Braun (6 June 1850 - 20 April 1918) was a German inventor, physicist
http://en.wikipedia.org/wiki/Karl_Ferdinand_Braun

Johannes Müller von Königsberg (6 June 1436 - 6 July 1476) was a German mathematician
http://en.wikipedia.org/wiki/Regiomontanus

Emery Molyneux (died June 1598) was an English Elizabethan maker of globes
http://en.wikipedia.org/wiki/Emery_Molyneux

Ralph Belknap Baldwin (June 6, 1912 - October 23, 2010) was an American planetary scientist 
http://en.wikipedia.org/wiki/Ralph_Belknap_Baldwin

Govaert Wendelen (6 June 1580 - 24 October 1667) was a Flemish astronomer 
http://en.wikipedia.org/wiki/Godefroy_Wendelin

Xi Zezong (June 6, 1927, Yuanqu, Shanxi - December 27, 2008, Beijing) was a Chinese astronomical historian
http://en.wikipedia.org/wiki/Xi_Zezong

NGC 6527 was discovered by Lewis A. Swift on the 6th June 1886.
http://astronomy.activeboard.com/t60024800/ngc-6527/