Word: slipher
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Dates: during 1980-1989
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...telescopes to the path in the skies where he had said his planet would be moving. The night of last Jan. 21, Clyde W. Tombaugh, 24, an assistant at the observatory, saw a strange blotch of light on a new plate. He hastily took the photograph to Vesto Melvin Slipher, director of the observatory. They were quite excited. Here visibly was Percival Lowell's proof. Night after night they rephotographed the planet. Pictures showed that it moved slightly in the same direction as the other planets. This was additional proof. They might have shouted out their find at once...