Lowell's Prediction of a Trans-Neptunian Planet

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THE reported discovery of a planet exterior to Neptune naturally arouses the interest of the general public. It will be of importance in theories concerning the genesis of the solar system as to how far it falls into line with the other planets as regards distance, mass, eccentricity and inclination of orbit, and presence or absence of satellites. Its physical appearance will be beyond observation. To those interested in dynamical astronomy, it may be of some interest to consider the data which led to its discovery and to make some comparison with the corresponding facts relating to Neptune.

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JACKSON, J. Lowell's Prediction of a Trans-Neptunian Planet. Nature 125, 451–452 (1930) doi:10.1038/125451a0

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