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List of hypothetical Solar System objects

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"The only true wisdom is in knowing you know nothing."
Socrates



SUMMARY
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A hypothetical Solar System object is a planet, natural satellite, moonmoon or similar body in the Solar System whose existence is not known, but has been inferred from observational scientific evidence. Over the years a number of hypothetical planets have been proposed, and many have been disproved. However, even today there is scientific speculation about the possibility of planets yet unknown that may exist beyond the range of our current knowledge.