1896
Birthday of Friedrich Hund, a German physicist known for his work on atoms and molecules. He is best known for the Hund’s rule, which governs electronic configurations and is important in spectroscopy and quantum chemistry.
For further reading,
https://en.wikipedia.org/wiki/Friedrich_Hund
1943
Birthday of Ken Thompson, an American pioneer of computer science. Thompson designed and implemented the original Unix operating system. He co-invented the Go-programming language.
For further reading,
https://en.wikipedia.org/wiki/Ken_Thompson
1967
Lunar Orbiter program: Lunar Orbiter 3 lifts off from Cape Canaveral’s Launch Complex 13 on its mission to identify possible landing sites for the Surveyor and Apollo spacecraft. It was also equipped to collect selenodetic, radiation intensity, and micrometeoroid impact data.
For further reading,