Comment Re:Is that the name? (Score 2, Informative) 763
This is from the University of Arizona: http://seds.lpl.arizona.edu/nineplanets/nineplanet s/hypo.html#planetx
Planet X was theorized as a possible cause for large deviations in Uranus's orbit. The discovery of Pluto was directly related to this Planet X theory.
Planet X was theorized as a possible cause for large deviations in Uranus's orbit. The discovery of Pluto was directly related to this Planet X theory.
