Clyde Tombaugh
Clyde Tombaugh using the blink comparator to check images of night sky taken at the same time a few nights apart. Stars remain fixed in the sky, so any sign of movement among them on Tombaugh's photographic plates would indicate that the star was in fact a planet
Picture No
10800172
Media ID
47595907
Size
3867px x 2876px
(7.4MB)
Credit
©Photo Researchers / Mary Evans Picture Library
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Source
Photo Researchers
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Restrictions Only for Ireland and United Kingdom
Astronomer Astronomical Blink Clyde Discoverer Invented Planetary Pluto Surname
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