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ALS signed “Clyde W. Tombaugh, Professor of Astronomy Emeritus, NMSU,” one page, 8.5 x 11, New Mexico State University Department of Astronomy letterhead, February 24, 1976. Handwritten letter to Bernard Harris, Jr., in part: "The enclosures may be of interest to you and your class. Unfortunately, my supply of the reprints of 'Reminiscences of the Discovery of Pluto' is so low that I would appreciate the return of this copy later. Shows images of Pluto in star field. I calculated the models of the solar system and galaxy for my classes in astronomy to aid the students in acquiring some concept of proportions of the universe." In fine condition. Accompanied by one of the typed enclosures, headed "Model of the Solar System," hand-corrected by Tombaugh to add: "One light year would be represented by 11,600 miles, with the Earth represented as a 1-inch ball."
From the personal collection of a lifelong collector, teacher, and traveler with a passion for world history. His collecting years ranged from the 1970s to the present day, meaning that several of the premier pieces have not been on the market in decades.
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