Comment on Possible new dwarf planet found in our solar systemparentComments−Timwi1yIndeed, before the planet/dwarf planet debate, Pluto and Charon were sometimes called a “binary planet” because their center of rotation is outside the volume of either body.
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Indeed, before the planet/dwarf planet debate, Pluto and Charon were sometimes called a “binary planet” because their center of rotation is outside the volume of either body.