What are three theories of how our moon was created?

Answer 1

1. 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.
2. The Capture Theory: The Moon was formed somewhere else, and was later captured by the gravitational field of the Earth.
3. The Condensation Theory: The Moon and the Earth condensed together from the original nebula that formed the Solar System.
4. The Colliding Planetesimals Theory: 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.
5. The Ejected Ring Theory: 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.

Answer 2

1. The Giant Impact Theory suggests that a Mars-sized object collided with Earth, ejecting material that eventually formed the Moon.
2. The Co-formation Theory proposes that the Moon formed at the same time as Earth from the same material.
3. The Capture Theory suggests that the Moon was formed elsewhere in the solar system and was later captured by Earth's gravitational pull.