After he discovered Uranus's rings alongside Edward Dunham and Jessica Mink at Cornell, he returned to MIT in 1978 to serve as Professor of Physics, Professor of Earth, Atmospheric, and Planetary Sciences, and Director of the George R. Wallace, Jr. Astrophysical Observatory until his death on March 3, 2011.
After he discovered Uranus's rings alongside Edward Dunham and Jessica Mink at Cornell, he returned to MIT in 1978 to serve as a Professor of Physics, Professor of Earth, Atmospheric, and Planetary Sciences, and Director of the George R. Wallace, Jr. Astrophysical Observatory until his death on March 3, 2011.