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Canonical Source · peer reviewed study
This page documents how this source is reused across Claim by Claim. A source can support, challenge, qualify or contextualize different claims; appearing here does not imply endorsement of every linked proposition.
Evidence context
Evidence roles describe what this source helps establish inside each Investigation. They are local to that use, not permanent labels attached to the publication itself.
Investigation
The best-developed scientific hidden-planet hypothesis places Planet Nine hundreds of AU from the Sun at perihelion and therefore does not supply a candidate for repeated Earth-threatening encounters.
Investigation
A leading quantitative Planet Nine model places the hypothetical object on a distant orbit with an estimated semimajor axis around 380 AU and perihelion around 300 AU, not on an orbit that repeatedly enters the inner Solar System.
This is the strongest serious counterpoint to the idea that every proposed undiscovered planet is Nibiru.
Subject families