For all known astronomers.
“Carl Edward Sagan (9 November, 1934–20 December, 1996) was an American Muggle astronomer...Carl Sagan
“Nicolaus Copernicus (b. 19 February, 1473—24 May, 1543) was a Polish polymath who lived during...Copernicus
“Sir Isaac Newton was an English physicist, famous for his three laws of motion. The works of...Isaac Newton