How the moon formed…. The Capture hypothesis: The Moon was formed somewhere else, and was later captured by the gravitational field of the Earth.

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Presentation transcript:

How the moon formed…

The Capture hypothesis: The Moon was formed somewhere else, and was later captured by the gravitational field of the Earth.

The Condensation hypothesis: The Moon and the Earth condensed together from the original nebula that formed the Solar System

The Colliding Planetesimals hypothesis: The interaction of earth-orbiting and Sun- orbiting planetesimals (very large chunks of rocks like asteroids) early in the history of the Solar System led to their breakup. The Moon condensed from this debris.

The Ejected Ring hypothesis: A planetesimal the size of Mars struck the earth, ejecting large volumes of matter. A disk of orbiting material was formed, and this matter eventually condensed to form the Moon in orbit around the Earth.

Five Serious Hypotheses The Fission theory: The Moon was once part of the Earth and somehow separated from the Earth early in the history of the Solar System. The present Pacific Ocean basin is the most popular site for the part of the Earth from which the Moon came.