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Transcript of Simon Marius
Simon Marius was a German astronomer. He was born in Gunzenhausen, near Nuremberg, but he spent most of his life in the city of Ansbach
Born January 20, 1573
Gunzenhausen, Principality of Ansbach
Died December 26, 1624 (aged 51)
Ansbach, Principality 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. This led to a dispute with Galileo, who showed that Marius provided only one observation as early as Galileo's, and it matched Galileo's diagram for the same date, as published in 1610
That in 1612 he measured the diameter of the Andromeda nebula and discerned it as having a dull, pale light which increased in brightness toward its center, like "a candle shining through horn"
Marius drew conclusions about the structure of the universe from his observations of the Jovian moons and the stellar disks.