Like most satellites in the universe, the Moon is composed entirely of solid rock.It is lifeless, and all covered with scars in the form of numerous craters, testifying to the huge amount of cosmic collisions in those days, when the young solar system has not yet acquired the stability and orderliness.The rotation of the Moon around the Earth is one of the key factors in the origin and development of life on our blue ball.
Despite the similarity of the moon with a variety of other known satellites, something it is unique.For a long time it was believed that the Moon was formed from the material remaining after the birth of the Earth.But in 1960, researchers had put forward a completely different theory that our natural satellite was formed by the collision of Earth with a grand another planet the size of Mars.By assumption, scholars began this way rotation of the Moon around the Earth.
But to test this hypothesis was only in 1969 when the astronauts who participated in the program "Apollo", taken from the moon rock samples.After analyzing the rocks, the scientists were simply amazed - they were identical to the rock, extremely common on the planet.And they were overheated, which fully confirmed the theory of a clash, which initially met with a cold in the scientific community.
About four and a half billion years ago the solar system was incredibly chaotic and extreme places.Land was one of hundreds of planets orbiting a young star.All of these sites faced each other, and survived only the largest of them.The world was lucky - it was enough for the survival of the size.And even acquired its own satellite.
When starting rotation of the moon around the earth, it was only twenty-four thousand kilometers from the planet.If we could look at the sky five hundred million years after the formation of the Moon, it would occupy a large part of it.So close it was located.And the speed of rotation of the moon around the earth then was quite different, however, as most of our world, whereas the former has not blue.
Now it's hard to believe, but if the velocity of our planet was so huge that day lasted six hours.The proximity of the Moon in conjunction with the gravity it played the role of a brake.So earthly day came twenty-four hours.However, this process was mutual - under the influence of the gravitational field of the planet rotating around the earth, too, the moon slowed.
But it is not only the mutual influence of this celestial tandem.The gravity of the Moon also creates huge tides on the planet, that the sea is agitated, mixed minerals and nutrients.This "lunar effect" has created a sort of "primordial soup" from which later emerged the first forms of life on our planet.Without the influence of the moon on the Earth life could not have arisen ...
Now our natural satellite revolves around the Earth on an elliptical orbit orderly.For many centuries people watch constantly decreasing lunar disk.This is due to the fact that the moon, according to the law of centrifugal force, away from the Earth is approximately five centimeters per year.As long as the balance of gravity firmly keeps the satellite in orbit.But it is not ruled out such an option, which was once the moon will be independent of celestial objects.
