211-clyde-tombaugh-dixon – A montage portrait honors American astronomer Clyde Tombaugh, the discoverer of Pluto. His likeness is set against a dense background of stars and interstellar nebulae, flanked by two celestial bodies representing Pluto and its largest moon, Charon, depicted with cratered, icy surfaces. Two overlapping rectangular photographic plates containing faint star fields represent the blink comparator method used to detect Pluto's motion in 1930., 50th anniversary commemorative poster, 1980
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