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the moon has a different iron level than the earth because the moon was not formed from the earth .
The composition of the moon mostly resembles the Earth's mantle.
earth has people in it's atmosphere
it is smaller
Saturn has rings but earth do not have rings. Earth has only one moon, while Saturn has 18 moon.
The Gas Giants have a deep gas atmosphere and earth have a not so deep atmosphere
The Gas Giants have a deep gas atmosphere and earth have a not so deep atmosphere
The Gas Giants have a deep gas atmosphere and earth have a not so deep atmosphere
It is the distance between the earth and moon.
Temperatures vary so much because the moon does not have an atmosphere.
They have some information about the age and composition from the moon rocks they brought back. The number of craters and their shape also helps determine age and composition. They know the atmosphere, the total mass, the rotation speed and the distance from earth. All these things help in developing a theory on how the moon was formed. It is widely accepted that the Moon formed from an impact to the Earth, when it was still molten. Evidence of this is from extremely similar composition of the Earth and the Moon, and the fact that the Moon is slowly drifting away from us.
From the sun to the moon to the earth.