The Search for a Planet beyond Neptune

@article{Grosser1964TheSF,
  title={The Search for a Planet beyond Neptune},
  author={Morton Grosser},
  journal={Isis},
  year={1964},
  volume={55},
  pages={163 - 183}
}
N February 18, 1930, an assistant of the Lowell Observatory at Flagstaff, Arizona, found two tiny images 3.5 mm. apart on a pair of plates he was examining in a blink microscope. The dots were the photographic records of a moving object; their separation indicated that it was very distant, beyond the orbit of Neptune. The object was Pluto, the ninth planet of the solar system, and in finding it Clyde Tombaugh accomplished what his predecessors had been trying to do for more than eighty years… Expand
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A Complete Bibliography of Publications in Isis, 1960{1969
Aborigenes [78]. according [155]. Action [39, 72]. actuelle [87]. actuelles [107, 84]. Acvaghosa [8]. Aegypten [30]. Aether [126]. Agnes [42]. al [11]. Albert [45]. alcune [51]. Algerien [30]. allaExpand

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The Discovery of 58 Reaves , Gibson , " Kourganoff ' s contribu - Pluto , " Monthly Notices of the Royal Astro - tions to the history of the discovery of Pluto
  • 1931