Edward F. Guinan is a professor in Villanova University's Department of Astronomy and Astrophysics. He and two colleagues observed evidence of Neptune's ring system in 1968, which was later discovered by Voyager 2 in 1989. He was also involved in building Iran's first high-powered telescope in the 1970s. He has been, and continues to be, involved in various international astronomical collaborations, such as helping to organize teaching and development programs in North Korea.