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Mercury, Venus and Mars are the three smallest. Pluto has been downgraded to a "dwarf planet". In fact it is now believed that it is not a true planet at all according to the official definition; but, because it has been counted among the planets for so long, there was sentiment at retaining it as one. A compromise was made calling it a "dwarf planet".

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โˆ™ 2008-09-24 13:32:31
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Q: What are the three smallest planets?
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