1573, Jan 201625, Jan 5
a German astronomer. He was born in Gunzenhausen, near Nuremberg, but he spent most of his life in the city of Ansbach. In 1614 Marius published his work Mundus Iovialis describing the planet Jupiter and its moons. Here he claimed to have discovered the planet's four major moons some days before Galileo Galilei.
 Gallery (1)

 Timeline (2)
01/01/1610-German astronomer Simon Marius first discovers the moons of Jupiter, but does not officially report it, Galileo Galilei does on July 1, 1610
12/15/1612-Simon Marius is first to observe Andromeda galaxy through a telescope
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