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Simon Marius - Windows to the Universe

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Simon Marius

Simon Marius was a German astronomer who lived between 1573-1624. He made observations of the heavens using a telescope and published yearly astronomical tables.

Throughout most of his life, Marius was plagued with accusations of plagiarism from other scientists. Although he named the four moons of Jupiter, their discovery is generally credited to Galileo.

Due to his strong religious beliefs and literal interpretation of the Bible, Marius never accepted the Copernican model of the universe.


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Windows to the Universe, a project of the National Earth Science Teachers Association, is sponsored in part by the National Science Foundation and NASA, our Founding Partners (the American Geophysical Union and American Geosciences Institute) as well as through Institutional, Contributing, and Affiliate Partners, individual memberships and generous donors. Thank you for your support! NASA AGU AGI NSF