Simon Marius

Simon Marius
Engraving of Marius in his book Mundus Iovialis (World of Jupiter), 1614
Born	Simon Mayr (1573-01-10)10 January 1573 Gunzenhausen, Principality of Ansbach
Died	5 January 1625(1625-01-05) (aged 51) Ansbach, Principality of Ansbach
Nationality	German
Known for	Naming the four largest moons of Jupiter, studying Andromeda Galaxy, Jupiter
Scientific career
Fields	Astronomy

Simon Marius (latinized form of Simon Mayr; 10 January 1573 – 5 January 1625)^[1] was a German astronomer. He was born in Gunzenhausen, near Nuremberg, but spent most of his life in the city of Ansbach. He is best known for being among the first observers of the four largest moons of Jupiter, and his publication of his discovery led to charges of plagiarism.