I'm not sure its a real "theory" as much as it is science for you see when the earth was being created chunks of meteorite was flying around crashing and combing and making gravity pulls sucking in more rocks and colliding with larger ones and earth's "followers" had crashed into earth breaking off pieces then those pieces collided and made the moon
It's the fission theory, if anyone wants the wrong answer.
gravity
The second theory says that the moon is a captured asteroid.
There are many theories to the creation of the moon. One theory is that it is a part of the Earth. Part of the molten earth that pulled away, but got caught in the gravitational pull of Earth.
unified theory
The capture theory says that the moon was originally orbiting the sun, but it passed to near the earth, and became the moon. The biggest problem with this theory is that this action would have created so much heat that it would melt the earth.
moon
Earth gravity is pulling the moon, that is why it orbits. The only reason the moon doesn't get pulled closer is because it is orbiting to fast to be pulled.
Because of the gravitational force difference on earth and moon.
In order for the moon to have been captured by the earth, it has to be smaller than the earth. If it were bigger, it would have pulled the earth into its orbit, making the earth the moon.
No, The moon was created when Earth could not sustain life. The moon was pulled into Earth's Gravitational pull and now orbits around Earth.
Yes. the mutually attracting forces of gravity hold the moon and earth together and cause the earth's tidal forces.