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
Famous quotes containing the word planet:
“Mad? Is it mad that you destroy other people to save yourselves? You have done this. Is it mad that one country must destroy another to save themselves? You have also done this. How then is it mad that one planet must destroy another who threatens their very existence?”
—Edward D. Wood, Jr. (1922–1978)
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