Polydeuces (moon)
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What links here
Blink comparator
Ben Mayer
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Frank Elmore Ross
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Robert Burnham Jr.
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Robert T. A. Innes
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Observational astronomy
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Visual comparison
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Refracting telescope
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Photographic plate
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Yrjö Väisälä
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Lowell Observatory
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Proper motion
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Pluto
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Planets beyond Neptune
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Kuiper belt
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Clyde Tombaugh
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