What are the similarities of the moon and the earth?

Mysteriously, they are made largely of the same materials which casts doubts on the Giant-impact hypothesis (which predicts the moon should be made of 70% material from Theia, the so-called planet that collided with Earth).

Anyway, they are both rocky. Planets beyond Mars are gas giants with rocky moons, so they have that difference, but the earth and Mars are rocky planets with rocky moons.

Author: Wayne Boyd

Wayne Edward Boyd was born in Morristown, New Jersey in 1953. He is a published author, former ISKCON sannyasi, and traveler, having lived on 3 continents and visited 37 countries. He presently lives in Amarillo, Texas working as a correctional officer and has interests in photography, political science and astronomy.

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