Helisaeus Roeslin dating history

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Helisaeus Roeslin or Helisäus Röslin (17 January 1545 – 14 August 1616) was a German physician and astrologer who adopted a geoheliocentric model of the universe. Roeslin attended the University of Tübingen in order to become a physician. After becoming a physician Roeslin became very interested in astrology as well as predicting when the second coming of Christ would occur. He was one of five observers who concluded that the Great Comet of 1577 was located beyond the Moon. His representation of the comet, described as "an interesting, though crude, attempt," was among the earliest and was highly complex. Roeslin also came to the conclusion independently that it was the sun not the Earth that was center of the solar system. Today Helisaeus Roeslin is best remembered for his controversies and involvement with geo-heliocentric world systems and for writing books about astronomy. Some of his works consist of a Ratio Studiorum et operum, the Tabella, and De opere Dei creationis.