The Earth and Moon Were Once One
Harvard scientists believe that the moon was once part of the Earth that was "chopped off" after a big collision with another celestial body. In a study published in Science experts from Harvard Matija Cuk and Sarah Stewart stated that their theory could explain why the Moon and Earth have a similar chemical composition. As reported by Reuters, the Earth was spinning faster at the time when the Moon was formed and a day lasted for only 2 or 3 hours. With such rapid rotation of the Earth, a huge blow could've chopped off enough material from the Earth in order to form the Moon, the scientists said.
According to the new theory, the Earth got in the present phase of rotation after that happening, thanks to the gravitational interaction of its orbit and the Moon's orbit around it. The scientists say that their attitude is different than the current leading theory that the Moon was formed from a material of a huge celestial body that hit the Earth once. Sara Stewart is a professor at Harvard and Matija Cuk, an astronomer at the SETI-research institute which is engaged in research relating to life on other planets, and manages and post-doctoral studies at Harvard. Could it really be true, that the Earth and the Moon were once one?