Clyde Tombaugh and the discovery of Pluto.
Contributors: Hockey, Thomas A.
Publisher: Astronomical Society of the Pacific
Place of publication: San Francisco, CA
Number of pages: 39
Subjects: Tombaugh, Clyde William,  -- 1906-; Astronomy.; Pluto (Planet); Planets.
Description: Clyde Tombaugh demonstrates the blink machine through which he first discovered Pluto.  He discusses some of the problems of observing and blinking photographs and the importance of the planet's position in the sky as it was photographed on a particular night.
Notes: "VT 101."

Producer and director, Thomas Hockey.

This tape does NOT have captions or subtitles