inner solar system
planets
space
earth
mars
mercury
luna
jupiter
Comments
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also, if a planet has half the radius of other planet, it will have 8 TIMES less mass (assuming density is the same)
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pretty sure it only has half the mass of mars
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mercury has the same mass (and so gravity) as mars since it has a large and dense iron core
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wheres the ISS tho (i know its an acronym)