Scientists suggest many theories about the formation of moon. The first theory is capture theory. The capture theory which says moon was formed elsewhere and one day moon was attracted to earth’s gravity and started to revolve earth. The second well accepted theory the big impact theory. This theory says that there were two planets called Theia and proto-earth. one day the two planets merged with each other.
After a while the planets separated. Although Theia had been separated, it started to orbit the proto-earth because of its gravity and Theia became moon.
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