Hypothetical planet
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For other hypothetical astronomical objects, see Hypothetical astronomical object (disambiguation).
A hypothetical planet or hypothetical planetary object is a planet or similar body whose existence is not proven, but is speculated on by some.
- For hypothetical planets in the Solar System, see: List of hypothetical Solar System objects
- For hypothetical extrasolar planets see: List of unconfirmed extrasolar planets
- For hypothetical planets in fiction see: Fictional planets of the Solar System
- For planets whose existence is not accepted by science see: Planetary objects proposed in religion, astrology, ufology and pseudoscience
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