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