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Pluto was not found by accident. Scientists saw that Neptune did not always move in orbit as it should. Something was pulling it. So, scientists searched for a ninth planet for decades.

Clyde Tombaugh found Pluto in 1930 after nearly a year of examining photographs with a blink comparator which rapidly shifts between two images alowing the observer to see differences in the (astronomical) images as blinking dots.

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7y ago

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