and the only natural satellite of the Earth, the Moon, after the Sun is the second brightest object.As it is the fifth largest solar system object.Between the centers of the Moon and the Earth's average distance of 384,467 km.The mass of the moon corresponds to 7.33 * 1022kg.
Since ancient times people have tried to describe and explain its movement.The basis of all modern theory calculations of Brown, which was established at the turn of XIX - XX centuries.To determine the exact movements of the heavenly bodies was necessary not only to the mass of the moon.Taken into account numerous factors trigonometric functions.Modern science by virtue of a more precise calculations.
laser ranging can measure the size of celestial objects with an error of only a few centimeters.With it was found that the mass of the moon is much smaller than the mass of the planet (81 times) and its radius is less than 37 times.For a long time to accurately determine this amount was not possible, but the launch of satellites allowed to open new perspectives.Known for a fact that at the time of Newton weight was determined by the magnitude of the Moon caused it tide.
We can see different illuminated surface of the satellite.The visible part of the disk illuminated by the Sun, called the phase.There are four phases of the moon completely dark surface - new moon rising crescent moon - the first quarter, fully illuminated disk - full moon illuminated half of the second side - the last quarter.They are expressed in hundredths and tenths of units.Change all the phases of the moon - the synodic period, which is a request from the moon to the new moon phase New Moon later.It is also called the synodic month, equal to about 29.5 days.During this time the moon will be able to pass along the orbit path and have time to visit twice in the same phase.The sidereal orbital period, lasting 27.3 days, a complete revolution of the Moon around the Earth.
common mistake to claim that the surface of the moon, we see on the one hand and that it does not rotate.Movement of the moon occur in the form of rotation around its axis and revolution around the Earth and the Sun
complete revolution around its axis takes 27 Earth days for 43 minutes.and 7 hours.Handling an elliptical orbit around the Earth (one full turn) occurs at the same time.To this affect the tides in the lunar crust, causing the tides in the world, taking place under the influence of lunar attraction.
Being farther away from the Moon than the Earth, the Sun because of its huge mass attracts twice as strong as the Moon than the Earth.Earth distorts the trajectory of the moon around the sun.In relation to the Sun, its trajectory is always concave.
The moon has no atmosphere, the sky above it always black.Due to the fact that the sound waves do not propagate in a vacuum, on this planet, there is complete silence.Under direct sunlight the temperature during the day is much higher than the boiling point of water, and at night up to -150 C. The proportion of the moon is one.Its density is only 3.3 p.more water.On its surface there are vast plains, which are covered with solidified lava, a lot of craters formed when asteroids fall.The gravitational force of earth's gravity gives way and the weight of the Moon is smaller than Earth, so the weight of the human body may be reduced up to 6 times while on the Moon.
on radioactive substances, scientists have determined the approximate age of the moon, which is 4.65 billion. Years.According to the latest most plausible hypothesis, it is assumed that the formation of the moon was the result of a giant collision with a young Earth huge celestial body.According to another theory, the Earth and Moon were formed independently in very different parts of the solar system.
