bn:01710986n
Noun Named Entity
Categories: Astronomical controversies, Trans-Neptunian objects, Early scientific cosmologies, Hypothetical bodies of the Solar System, Solar System dynamic theories
EN
planet beyond Neptune  planets beyond Neptune  10th Planet  Eleventh Planet  Planet 10
EN
Following the discovery of the planet Neptune in 1846, there was considerable speculation that another planet might exist beyond its orbit. Wikipedia
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