Abstract
Certain peculiarities of the orbit of Mercury may be explained if there was once a planet between Mercury and Venus. But this orbit would have been unstable, and the hypothetical planet could have been captured by the Earth.
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BAILEY, J. The Moon may be a Former Planet. Nature 223, 251–253 (1969). https://doi.org/10.1038/223251a0
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DOI: https://doi.org/10.1038/223251a0
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