Lt. Gen. Thomas ‘Stonewall’ Jackson dies from complications after an amputation - a result of his own troops accidentally firing upon him one week previously at the Battle of Chancellorsville, hours after his famous flank attack.
July 20, 1976 - Viking 1 makes first Martian landing.
Paving the way for generations of Martian landers and orbiters, NASA’s Viking 1 mission became the first spacecraft to safely land on the Red Planet’s surface on this day in 1976.
Following launch on a Titan IIIE rocket, Viking’s 10-month cruise to Mars culminated in orbit insertion on June 19. Landing was initially planned for the United State’s Bicentennial on July 4, 1976, but initial reconnaissance of the landing site proved to be too rough for the spacecraft. Landing was delayed to July 20th at Chryse Planitia.
Two 1,270 pound landers complimented two orbiters as part of NASA’s Viking program. Viking 1 launched on August 20, 1975 and landed on July 20, 1976, while Viking 2 launched on September 9, 1975 and landed on September 3, 1976.
The first photograph ever taken from the surface of Mars showing one of Viking 1′s landing pads.
Viking’s science instruments provided the first in-situ, or ground based observations of Martian seismic, atmospheric, and chemical activity. Since the biological compatibility of Mars’ surface was completely unknown at the time, both Viking landers carried instruments to directly test of organic life. Of the four, three instruments returned negative results while one returned a positive result.
This discrepancy was first attributed to the chemical reactions of inorganic compounds in the Martian soil, but has been disputed in recent years as data from other Martian missions has been analyzed.
Viking 1 far outlasted its designed operational lifetime of 90 days, transmitting data until November 11, 1982. Upon its deactivation, it was named the Thomas Mutch Memorial Station after the leader of the program’s imaging team.
Viking 1′s Surface Sampler Boom prepares to deliver a soil sample to the spacecraft’s science instruments.
On this day: Paige and Emma meet in the Finals of an 8-Diva tournament on NXT where The Enchanting Raven Haired Lady fights off an attacking Emma to land the Paige Turner, earn a three count and become the very first NXT Women’s Champion. (7/24/13)
On 16 July 1969, American astronauts Neil Armstrong, Edwin “Buzz”
Aldrin, and Michael Collins lifted off from Cape Canaveral, Fla., in the
mammoth-sized Saturn V rocket on their way to the moon during the
Apollo 11 mission.
70 years ago today: Operation Crossroads, shot Baker, at the Bikini Atoll. The underwater detonation of a Nagasaki-style nuclear bomb created a massive mushroom cloud of radioactive water that promptly crashed down again, irradiating the target fleet and creating “the world’s first nuclear disaster,” in the words of a top government official. More here: http://blog.nuclearsecrecy.com/2016/07/25/operation-crossroads-70/
It is all very beautiful and magical here, a quality which cannot be described.
- Ansel Adams
#Summer at the Conservatory Garden #CentralPark #NewYorkCity
#OTD 163 years ago, the New York State legislature set aside more than 750 acres of land on the island of #Manhattan creating America’s first major landscaped public park. The park has since been extended to 843 acres.
So lucky to have this gem of a park in the middle of this great city! Happy birthday Central Park! You bring joy in so many ways! 💐
#hbdcentralpark (at Central Park Conservatory Garden)
On July 15, 1662, Charles II granted a royal charter of
independence to the Royal Society. The group of polymaths (including such famous
minds as Newton, Wren and Hooke) had been gathering for some years,
formalized their meetings in 1660 and then received positive attention from the
newly returned king.
At the start of his History of The Royal Society of London, Thomas Sprat wrote this beautiful dedication letter to Charles II. He thanks the king for supporting “this Noble Design of Experiments” and says “For, to increase the Powers of all Mankind, and to free them from the bondage of Errors, is greater Glory than to enlarge Empire, or to put Chains on the necks of Conquer’d Nations.”… “Your Majesty will certainly obtain Immortal Fame, for having establish’d a perpetual succession of Inventors.”
#OTD July 20, 1969 Apollo XI astronauts Neil Armstrong and Buzz Aldrin walked on the moon! Nixon administration speech writer William Safire had the grim task of preparing an address to be given in the case of the Apollo XI mission not ending in success - “IN EVENT OF MOON DISASTER” Fortunately for everyone involved, the address was not needed. (Citation: White House Special Files: Staff Member and Office Files: H. R. Haldeman; box 294; folder [H. R. Haldeman Personnel Material; Richard Nixon Presidential Library and Museum)