Statements (23)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
scientific theory
|
| gptkbp:alternativeTo |
gptkb:Nemesis_hypothesis
gptkb:Tyche_hypothesis |
| gptkbp:basedOn |
unusual clustering of trans-Neptunian objects
|
| gptkbp:category |
Astronomy
Planetary science |
| gptkbp:discusses |
gptkb:The_Astronomical_Journal
|
| https://www.w3.org/2000/01/rdf-schema#label |
Planet Nine hypothesis
|
| gptkbp:influenced |
orbits of distant Solar System objects
|
| gptkbp:notSignedBy |
direct observation
|
| gptkbp:proposedBy |
gptkb:Michael_E._Brown
gptkb:Konstantin_Batygin 2016 Planet Nine has a mass about 5–10 times that of Earth Planet Nine is a super-Earth Planet Nine orbits far beyond Neptune existence of a ninth planet in the Solar System Planet Nine has an orbital period of 10,000–20,000 years |
| gptkbp:relatedTo |
gptkb:Kuiper_belt
trans-Neptunian objects |
| gptkbp:subjectOf |
ongoing astronomical searches
|
| gptkbp:bfsParent |
gptkb:Planet_X
|
| gptkbp:bfsLayer |
6
|