Edward Guinan

Edward Guinan is currently a professor in Villanova University's Department of Astronomy and Astrophysics. He and two colleagues discovered Neptune's ring system.[1][2]


  1. John Noble Wilford. "Data Shows 2 Rings Circling Neptune". Archives, The New York Times (June 10, 1982). Retrieved 2007-06-28.
  2. "Evidence for a Ring System on Neptune" (PDF). Abstracts, Astronomy ADS. Retrieved 2007-06-28.