Wall Arch, a natural sandstone arch in the Arches National Park collapsed on August 4, 2008http://en.wikipedia.org/wiki/Wall_ArchThe 1946 Dominican Republic magnitude 8.0 earthquake struck on August 4, 1946http://en.wikipedia.org/wiki/1946_Dominican_Republic_earthquake
The Noon Gun in Cape Town first signal fired on 4 August 1902http://en.wikipedia.org/wiki/Noon_Gun#HistoryThe German Type U 1 submarine, was launched on the 4th August 1906http://en.wikipedia.org/wiki/SM_U-1_(Germany)
The launch of Discoverer 28 occurred at 00:01 UTC on 4 August 1961.http://en.wikipedia.org/wiki/Discoverer_28The Phoenix spacecraft was launch on the 4th August 2007http://astronomy.activeboard.com/t3135659/the-phoenix-lander/On August 4, 2010, Arianespace orbited the NILESAT 201 direct broadcast satellitehttp://astronomy.activeboard.com/t37461189/nilesat-201-satellite/
Michael James McCulley (born August 4, 1943) is a former NASA astronaut and the first submariner in space.http://en.wikipedia.org/wiki/Michael_J._McCulleyCharles Donald Gemar (born 4 August 1955) is a former American astronauthttp://en.wikipedia.org/wiki/Charles_D._GemarAndrew Michael Allen (born 4 August 1955) is a retired American astronaut. http://en.wikipedia.org/wiki/Andrew_M._AllenJohn Venn (4 August 1834 - 4 April 1923), was a British logician and philosopher.http://en.wikipedia.org/wiki/John_VennJohann Gottlieb Lehmann (4 August 1719 - 22 January 1767) was a German mineralogist and geologisthttp://en.wikipedia.org/wiki/Johann_Gottlob_Lehmann_(scientist)Sir William Rowan Hamilton (4 August 1805 - 2 September 1865) was an Irish physicist, astronomer, and mathematicianhttp://astronomy.activeboard.com/t44250862/sir-william-rowan-hamilton-1805-1865/George Irving Bell (August 4, 1926 - May 28, 2000) was an American physicist, biologist and mountaineerhttp://en.wikipedia.org/wiki/George_Irving_BellAlexander George McAdie (August 4, 1863-November 1, 1943) was an American meteorologist. http://en.wikipedia.org/wiki/Alexander_George_McAdie
*Placemarker
NGC 55 was discovered by Scottish astronomer James Dunlop on the 7th July or 4th August 1826.http://astronomy.activeboard.com/t58232201/ngc-55/NGC 5128 was discovered by Scottish astronomer James Dunlop on the 4th August 1826.http://astronomy.activeboard.com/t6068300/centaurus-a/NGC 6601 was discovered by American astronomer Lewis A. Swift on the 4th August 1883.http://astronomy.activeboard.com/t58232187/ngc-6601/NGC 6607 was discovered by American astronomer Lewis A. Swift on the 4th August 1883.http://astronomy.activeboard.com/t58232182/ngc-6607/NGC 6608 was discovered by American astronomer Lewis A. Swift on the 4th August 1883.http://astronomy.activeboard.com/t58232176/ngc-6608/NGC 6609 was discovered by American astronomer Lewis A. Swift on the 4th August 1883.http://astronomy.activeboard.com/t58232171/ngc-6609/NGC 6768 was discovered by British astronomer John Herschel on the 4th August 1834. http://astronomy.activeboard.com/t58232167/ngc-6768/NGC 6783 was discovered by French astronomer Edouard Stephan on the 4th August 1872. http://astronomy.activeboard.com/t58232164/ngc-6783/NGC 7601 was discovered by British amateur astronomer Andrew Ainslie Common on the 4th August 1880.http://astronomy.activeboard.com/t58232161/ngc-7601/
Supernova 1181 was first observed between August 4 and August 6, 1181, by Chinese and Japanese astronomershttp://en.wikipedia.org/wiki/SN_1181Thr planet MOA-2008-BLG-310Lb was discovered by using the gravitational microlensing method on August 4, 2009.http://en.wikipedia.org/wiki/MOA-2008-BLG-310LbAsteroid (541) Deborah was discovered by Max Wolf on August 4, 1904.http://en.wikipedia.org/wiki/541_Deborah
MeteoritesThe Aldsworth (LL5) meteorite fell in England, UK, on the 4th August 1835.http://astronomy.activeboard.com/t44250733/aldsworth-meteorite/The Zag (H3-6 chondrite) meteorite fell in Saguia el Hamra, Western Sahara, on the 4th August 1998.http://astronomy.activeboard.com/t44250746/zag-meteorite/