In 1892 Chamberlin accepted the offer to organize a department of geology at the new University of Chicago, where he remained as a professor until 1918.
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During the 20th century many theories were proposed including the planetesimal theory of Thomas Chamberlin and Forest Moulton (1901), tidal model of Jeans (1917), accretion model of Otto Schmidt (1944), protoplanet theory of William McCrea (1960) and finally capture theory of Michael Woolfson.