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Theories of the Origin of the Moon The Moon is the only natural satellite of Earth The distance from Earth is about 384400km with a diameter of 3476km and a mass of 7351022kg Through history it has had many names Called Luna by the Romans Selene and Artemis by the Greeks And of course has been known through prehistoric times It is the second brightest object in the sky after the Sun Due to its size and composition the Moon is sometimes classified as a terrestrial planet along with Mercury Venus Earth and Mars Origin of the Moon Before the modern age of space exploration scientists had three major theories for the origin of the moon fission from the earth formation in earth orbit and formation far from earth Then in 1975 having studied moon rocks and close-up pictures of the moon scientists proposed what has come to be regarded as the most probable of the theories of formation planetesimal impact or giant impact theory Theological Formation of the Moon According to the Holy Bible God created the Moon as a light for the night sky It doesnt describe in detail how it was formed Possibly these other theories might be able to shed some more light into this matter Formation by Fission from the Earth The modern version of this theory proposes that the moon be spun off from the earth when the earth was young and rotating rapidly on its axis This idea gained support partly because the density of the moon is the same as that of the rocks just below the crust or upper mantle of the earth A major difficulty with this theory is that the angular momentum of the earth in order to achieve rotational instability would have to have been much greater than the angular momentum of the present earth-moon system Formation in Orbit Near the
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