Tremaine, along with Peter Goldreich, correctly predicted that shepherd moons created Saturn's thin F ring, as well as the thin rings of Uranus in 1979. The Saturnian moons Prometheus and Pandora were first observed in 1981 and shepherding moons were found around Uranus' rings in 1986. Tremaine cowrote the book Galactic Dynamics with James Binney, which is often regarded as the standard reference in the field and has been cited more than three thousand times in scholarly publications. Tremaine, along with collaborators at the University of Toronto, showed that short period comets originate in the Kuiper belt. Tremaine is credited with suggesting that the apparent "double nucleus" of the Andromeda Galaxy was in fact a single ring of old red stars.
Awards and honours
In 2013, Tremaine won the Tomalla Foundation Prize for his work on gravitational dynamics. In 2010, Tremaine received an honorary doctorate from the University of Toronto "in recognition of his scholarly contributions to the field of astrophysics, and his administrative leadership in support of Canadian and international science". In 2005, Tremaine won the Research Award from the Alexander von Humboldt Foundation. In 2002, Tremaine was elected to membership in the NationalAcademy of Sciences. In 1999, Tremaine also received an honorary Doctor of Science degree from St. Mary's University. In 1998, Tremaine won the Dirk Brouwer Award which is awarded by the Division of Dynamical Astronomy of the American Astronomical Society "in recognition of his many outstanding contributions to a wide range of dynamical problems in both solar-system and galactic dynamics." In 1997, Tremaine was awarded the Dannie Heineman Prize for Astrophysics for "diverse and insightful applications of dynamics to planets, rings, comets, galaxies and the universe." In 1996, Tremaine was awarded an honorary Doctor of Science award by McMaster University. In 1994, Tremaine became a Fellow of the Royal Society of London and also of the Royal Society of Canada. In 1990, Tremaine was awarded the Rutherford Memorial Medal in Physics by the Academies of Arts, Humanities and Sciences of Canada for "his outstanding contributions to the field to astrophysics, particularly his spectacular success in predicting the properties of planetary ring dynamics and the extraplanetary objects that control them". In 1990, Tremaine won the C.S. Beals Award from the Canadian Astronomical Society which is awarded for outstanding research to a Canadian astronomer or an astronomer working in Canada. In 1983, Tremaine won the Helen B. Warner Prize for Astronomy given by the American Astronomical Society in recognition of "his many outstanding contributions to a wide range of dynamical problems in both solar-system and galactic dynamics".