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:
“Are there no Moravians in the Moon, that not a missionary has yet visited this poor pagan planet of ours, to civilize civilization and christianize Christendom?”
—Herman Melville (1819–1891)