Earthquakes

Earthquakes Evolution of The Solar System Theories of the Origin of the Moon The Moon is the only natural satellite of Earth. The distance from Earth is about 384,400km with a diameter of 3476km and a mass of 7.35*1022kg. 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. Formation by Fission from the Earth The modern version of this theory proposes that the moon was spun off earth, moon, theory, impact, mass, formation, orbit, collision, system, theories, momentum, earth-moon, angular, about, out, origin, giant, form, been, years, solar, planetesimal, one, mars, different, conditions, calculations, body, three, scientists, scientific, present, material, major, large