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“Doug-Duncan-CU-DeptAstroAndPlanetarySc_680”

"Dr. Douglas Duncan, Department of Astrophysical & Planetary Sciences, and Director, Fiske Planetarium at CU. Photo by Colin Mahoney courtesy of Univ.…"

"Dr. Douglas Duncan, Department of Astrophysical & Planetary Sciences, and Director, Fiske Planetarium at CU. Photo by Colin Mahoney courtesy of Univ.…"