Which is the 9th planet created?
or:Which is the 9th planet created?or:The inner rocky planets Mercury, Venus, Earth and Mars were thought to have formed in the proto-planetary disk
or:Which is the 9th planet created?
or:The inner rocky planets Mercury, Venus, Earth and Mars were thought to have formed in the proto-planetary disk before the gas giants did. So according to this concept these 4 planets are a little older than Jupiter, Saturn, Neptune and Uranus. -Doc marz
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