This Day In Astro History

Repair to ISS P6 Truss
2013 - Space Walk - Repair to ammonia leak at P6 Truss

May 11

1918 - Richard Feynman's Birthday - In 1965, he,  along with Julian Schwinger and Shinichiro Tomonaga, shared the Nobel Prize in Physics for  work in quantum electrodynamics, famous for his unusual life style and for his popular books and lectures on mathematics and physics. Feynman also worked on the Space Shuttle Challenger accident investigation. He shocked the world by  demonstrating the failure of the O-rings. Feynman  died February 15, 1988 at the age of 69.

1916 - Karl Schwarzschild dies at Potsdam.  Using Einstein's theory of General Relativity to describe the way space time bends around matter, Schwarzschild described that when a star contracts, there comes a point at which its gravity is so strong that not even light can escape, a black hole. This point is now known as the Schwarzschild radius and is equal to an object's mass multiplied by twice the constant of gravity and divided by the speed of light squared.
Richard Feynman
Richard Feynman 

Karl Schwarzschild
1873 - 1916
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It is my conclusion that human evolution and the motions of matter in space are intrinsically linked. The observation and understanding of the complexity of biological history on Earth cannot be complete without the tandem observation and understanding of a dynamic greater cosmos. - SpaceGene