In what year was the man after whom the Reynolds crater on Mars was named born?
Reynolds (crater):  It measures 97.5 kilometers in diameter and was named after Osborne Reynolds, and the name was approved in 1973, by the International Astronomical Union (IAU) Working Group for Planetary System Nomenclature. Osborne Reynolds: Osborne Reynolds FRS ( ; 23 August 1842 – 21 February 1912) was a prominent innovator in the understanding of fluid dynamics.
1842