The Man Who (Almost) Discovered Pluto…and Also (Almost) Discovered the Expanding Universe

As the New Horizons probe closes in on Pluto–now less than two days away!–there have been a lot of thoughtful articles looking back at the people responsible for the discovery of this remarkable little world. They have focused mostly on Clyde Tombaugh, the man who spotted Pluto amidst a sea of stars in 1930. Some articles have also told the story of Venetia Burney, the 11-year-old girl who gave Pluto its name, or Percival Lowell, whose obsession with finding “Planet X” inspired Tombaugh’s

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