Clyde Tombaugh , American scientist
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"The planets are never the same twice, they're always different, so they could compare the markings I had drawn with their current photographs and they knew that I was drawing what I was really seeing and it wasn't copied from somewhere."
- Clyde Tombaugh Read all Clyde Tombaugh quotes, or find out more about Clyde Tombaugh
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- Clyde Tombaugh