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.
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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