For all known astronomers.
“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
“Carl Edward Sagan (9 November, 1934–20 December, 1996) was an American Muggle astronomer...Carl Sagan