John Loudon McAdam (21 September 1756 - 26 November 1836) was a Scottish engineer and road-builder. He invented a new process, "macadamisation", for building roads with a smooth hard surface that would be more durable and less muddy than soil-based tracks. Read more
John William Gofman (September 21, 1918 - August 15, 2007) was an American scientist and advocate. He was Professor Emeritus of Molecular and Cell Biology at University of California at Berkeley. Some of his early work was on the Manhattan Project, and he shares patents on the fissionability of ura...
Richard James Hieb (born September 21, 1955 in Jamestown, North Dakota) is a former NASA astronaut and a veteran of three space shuttle missions. He was a mission specialist on STS-39 and STS-49, and was a payload commander on STS-65. He is currently a the Vice-President of Lockheed Martin Civil Pro...
Max Immelmann (21 September 1890 - 18 June 1916) was the first German World War I flying ace. He was a great pioneer in fighter aviation and is often mistakenly credited with the first aerial victory using a synchronised gun. His name has become attached to common flying tactics, and remains a byword i...
Phyllis Nicolson (21 September 1917 - 6 October 1968) was a British mathematician most known for her work on the Crank-Nicolson scheme together with John Crank. Read more
The North American Aviation XB-70 Valkyrie was the prototype version of the proposed B-70 nuclear-armed deep-penetration strategic bomber for the United States Air Force's (USAF) Strategic Air Command. Designed by North American Aviation in the late 1950s, the Valkyrie was a large six-engine...
Title: Hair of astrophysical black holes Authors: Maxim Lyutikov (Purdue University and Osservatorio di Arcetri) The "no hair" theorem is not applicable to black holes formed from collapse of a rotating neutron star. Rotating neutron stars can self-produce particles via vacuum bre...
A new image from NASA's Chandra and Spitzer space telescopes shows the dusty remains of a collapsed star. The dust is flying past and engulfing a nearby family of stars. It shows the Chandra X-ray Observatory data in blue, and data from the Spitzer Space Telescope in green (shorter wavelength) and re...
Medvedev's Russia summertime switch set to end Russia is expected to reverse a reform brought in last year by ex-president Dmitry Medvedev to reduce the stress of changing the clocks. His answer was for permanent summer time, with darker mornings during the winter but lighter afternoons. [url=ht...
Orbital elements:
2012 SM8 Earth MOID = 0.0318 AU
Epoch 2012 Sept. 30.0 TT = JDT 2456200.5 MPC
M 352.19569 (2000.0) P Q
n 0.51625882 Peri. 208.03422 +0.90565304 -0.42399857
a 1.5389496 Node 177.04343 +0.40271587 +0.85699542
e 0.3388457 Incl. 4.69011 +0.13271213 +0.29288917
P 1.91 H 26.3...
The Oppau explosion occurred on September 21, 1921 when a tower silo storing 4,500 tonnes of a mixture of ammonium sulfate and ammonium nitrate fertilizer exploded at a BASF plant in Oppau, now part of Ludwigshafen, Germany, killing 500-600 people and injuring about 2,000 more. Read more
The New England Hurricane of 1938 (or Great New England Hurricane, Yankee Clipper, Long Island Express, or simply the Great Hurricane) was the first major hurricane to strike New England since 1869. The storm formed near the coast of Africa in September of the 1938 Atlantic hurricane season, becom...
The 921 earthquake, also known as Jiji earthquake, was a 7.3 Ms or 7.6 Mw earthquake which occurred at 1:47:12 am local time on Tuesday, September 21, 1999 (17:47:12 UTC on September 20) in Jiji, Nantou County, Taiwan. Read more
The B-29 Superfortress is a four-engine propeller-driven heavy bomber designed by Boeing that was flown primarily by the United States toward the end of World War II and during the Korean War. It was the primary aircraft used in the American firebombing campaign against the Empire of Japan in the f...
The Battle of Arnemuiden is a naval battle fought on 23 September 1338 at the start of the Hundred Years' War between England and France. It was the first naval battle of the Hundred Years' war and the first naval battle using artillery, as the English ship Christofer had three cannons and one hand gun....
