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by NZGumboot
3749 days ago
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I'm not an astronomer, so don't take this as gospel, but I believe that large undiscovered planets are expected to be rare. Mainly because they would have had to form in the inner solar system (where all the matter was) and then somehow flung into the outer reaches of the solar system (perhaps via a major collision). Relevant XKCD: https://xkcd.com/1633/ |
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