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Lecture 4 - 10/11 The History of the Moon Origin...

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10/11 The History of the Moon – Origin Constraints: Mass of the Moon - Mass compared to Earth is very large compared to other plants/ moons - Almost 100x larger than expected Earth – Moon Angular Momentum - Angular momentum: Spins faster as mass pulls towards center - Spins way too fast compared to other bodies in solar system Moon Orbit Inclination - Moon’s orbit is tilted w/ respect to equator of Earth - Almost all other planets have moons orbiting near equator Lack of Volatiles Volatile - - A more volatile substance evaporates at a lower temp than a less volatile (refractory) one - A world that has been heated will be depleted of volatile materials and enhanced in refractory materials - Anything more volatile than rock is considered more volatile - Compared to rest of solar system, Earth and Moon have an abundance of refractory materials o Meaning, they have been exposed to much heat in he past
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Lack of Iron Core - Moment of Inertia: .393 o Rock almost all the way through -
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