KnowraPlanet NineLinked fromLinked fromThe 8 pages that link to Planet Nine, each with the reason it gives.All 8Broader topic 1Related 2Compared with 5Oort cloudCompared with: Its existence and influence could alter models of distant Solar System populations, including the cloud.Scattered discCompared with: Its proposed influence concerns distant objects, but it is not established as the source of the scattered disc.Hills cloudCompared with: It is another unconfirmed claim about the distant Solar System, but proposes a planet rather than a comet reservoir.Nibiru cataclysmCompared with: Unlike Nibiru, Planet Nine is a testable scientific hypothesis with no claimed imminent passage near Earth.SednoidCompared with: Its gravitational influence is a debated explanation for the clustering of sednoid orbits.