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......
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