The Moon is Earth's only natural satellite. Organized as a sequence of 5 large moons in the solar system. The average distance from Earth is counting from the Center to the Center, approximately 384,403 kilometers, equivalent to 30 times the diameter of the Earth. The center of mass of the system together is located at 1700 kilometers beneath the Earth's surface or position, about 1/4 of the Earth's RADIUS. The Moon orbiting the Earth in approximately 27.3 days, [nb 1] When comparing the variable orbital period according to the geographical standard between the earth-moon-sun. The result is the phase of the Moon, which will repeat every 29.5 days cycle [nb 2] (called recycle peninsula chain, Nova)The diameter of the Moon is about 3,474 kilometres [1], or about one-fourth of the world. Therefore, the surface of the moon has less than one tenth of the surface of the Earth (about 1 in 4 of the continents of the world, representing a large estimated Russia. Canada to United States combined) total mass of the Moon, representing approximately 2% of the Earth's mass and gravity, 17% of the world.The symbol of the Moon is a 1933 ☾ 2512 (1969) Neil Armstrong and aldrin bas. Astronauts of NASA as a human organization 2 first person stepping on the ground of the moon. The Moon is the only celestial body to which mankind. According to the applicable treaty, the activities of States on the moon. Stars and other space objects, 1979
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