1695 Died: Christiaan Huygens, Dutch mathematician, astronomer, and physicist (b. 1629)
Christiaan Huygens (Latin: Hugenius; 14 April 1629 – 8 July 1695) was a Dutch physicist, mathematician, astronomer and inventor, who is widely regarded as one of the greatest scientists of all time and a major figure in the scientific revolution. In physics, Huygens made groundbreaking contributions in optics and mechanics, while as an astronomer he is chiefly known for his studies of the rings of Saturn and the discovery of its moon Titan. As an inventor, he improved the design of the telescope with the invention of the Huygenian eyepiece. His most famous invention, however, was the invention of the pendulum clock in 1656, which was a breakthrough in timekeeping and became the most accurate timekeeper for almost 300 years. Because he was the first to use mathematical formulae to describe the laws of physics, Huygens has been called the first theoretical physicist and the founder of mathematical physics
Here are some stamps from the Netherlands depicting Huygens and his clock
1838 Born: Ferdinand von Zeppelin, German general and businessman, founded the Zeppelin Airship Company (d. 1917)
Ferdinand Adolf Heinrich August Graf von Zeppelin (8 July 1838 – 8 March 1917) was a German general and later inventor of the Zeppelin rigid airships; he founded the company Luftschiffbau Zeppelin.
LZ 127 Graf Zeppelin (Deutsches Luftschiff Zeppelin #127; Registration: D-LZ 127) was a German-built and -operated, passenger-carrying, hydrogen-filled, rigid airship which operated commercially from 1928 to 1937. It was named after the German pioneer of airships, Ferdinand von Zeppelin, who was a Graf or Count in the German nobility. During its operating life, the airship made 590 flights covering more than a million miles (1.6 million km). It was designed to be operated by a crew of 36 officers and men. More about that here: http://en.wikipedia.org/wiki/LZ_127_Graf_Zeppelin
Some stamps from the US and Germany depicting Zeppelins
More Zeppelin stamps can be found here: Zeppelin on stamps
2011 – Space Shuttle Atlantis is launched in the final mission of the U.S. Space Shuttle program.
Space Shuttle Atlantis (Orbiter Vehicle Designation: OV‑104) is a Space Shuttle orbiter vehicle belonging to the National Aeronautics and Space Administration (NASA), the spaceflight and space exploration agency of the United States. Constructed by the Rockwell International company in Southern California and delivered to the Kennedy Space Center in Eastern Florida in April 1985, Atlantis is the fourth operational and the second-to-last Space Shuttle built. Its maiden flight was STS-51-J from 3 to 7 October 1985.
Atlantis embarked on its 33rd and final mission, also the final mission of a space shuttle, STS-135, on 8 July 2011. STS-134 by Endeavour was expected to be the final flight before STS-135 was authorized in October 2010. STS-135 took advantage of the processing for the STS-335 Launch On Need mission that would have been necessary if STS-134's crew became stranded in orbit.Atlantis landed for the final time at the Kennedy Space Center on 21 July 2011
Here are 3 covers commemorating Space Shuttle Atlantis' last mission
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