A Personal Account of His Discovery of the Planet Pluto
Clyde W. Tombaugh
Tuesday, 01 May 1990 at 12:00 am –
Clyde Tombaugh wrote about his discovery of the planet Pluto in his book Out of the Darkness: The Planet Pluto. He is Professor of Astronomy Emeritus at New Mexico State University. From the University Lectures Program archive.
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Lecture Etiquette
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