. On this day in 1904 – December 13th – theoretical physicist Sir William Hunter McCrea was born in Dublin, Ireland.
McCrea made contributions to mathematics, physics and almost every area of astronomy, but is best known for his seminal work in modern relativistic cosmology. He was elected a Fellow of the Royal Society and the Royal Society of Edinburgh, the Royal Astronomical Society, the Royal Irish Academy, and was awarded many other honors.
I bet he did use the Egyptian Multiplication Algorythem which I was reading about yesterday.
. On this day in 1857 – December 16th – American astronomer Edward Emerson Barnard was born in Nashville, Tennessee.
He was one of best visual observers of his day as well as a pioneer of celestial photography. Barnard's Star was named for him. It's a red dwarf star for which Barnard measured its proper motion relative to the Sun.
. On this day in 1917 – December 16th – British author, futurist, inventor and explorer Arthur C. Clarke was born in Minehead, Somerset, England.
Clarke wrote more than 100 books, and he inspired scientists and space explorers. In honor of his work, the International Astronomical Union named the distance of 36000 km above Earth the Clarke Orbit, and in 2018 they named a mountain on Pluto's moon Charon for him.
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