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.
[4] Today Helisaeus Roeslin is best remembered for his controversies and involvement with geo-heliocentric world systems and for writing books about astronomy.
[6] Kepler criticized Roeslin's predictions in his book De stella nova, on the comet of 1604, and the two kept up their arguments in a series of pamphlets written as dialogues.
[7] Roeslin's 1597 book De opere Dei creationis is regarded as one of the major works in the late 16th-century controversy over the formulation of a geoheliocentric world system.
Roeslin also inquired about two German princes becoming his patron; Johann I, count Palatine and Wilhelm IV, Landgrave of Hesse-Kassei.
Roeslin believed that in the year 1663 that the world would end with the final judgment by Christ and divine punishment of human wickedness.
[1] After Roeslin's death at Buchsweiler in 1616, his unpublished astrology, theology and kabbalistic work merged into the manuscript collection of Karl Widemann.