Moon in the Solar System

We perceive the moon as something quite natural, but perhaps this is not the case. The author, having studied the pictures, switch to this theme. We know little about the moons, we do not know what they are, where, why their behavior is so different from the others. In the introduction to the preliminary report on the flight of Apollo-17 "says that despite many efforts, the origin and formation of the Moon is still unknown. We are still on "baby" stage of development and we think that everything is always located as it is now. But the moons of Jupiter do not "walk like a clock, sometimes they are late to emerge from the horizon, sometimes hiding behind the planet and several minutes later appear. Sometimes, when Jupiter should be in the field of view, it is not visible vovse.Izvestny last astronomer Cassini saw a satellite orbiting Venus in 1672 saw him and other astronomers. Known, and its diameter - two thousand miles. After 1764 it no one else saw. Astronomers still think Venus has no moon.

Many people know the famous story of how Asaph Hall was opened in 1877, two tiny moons of Mars, after many unsuccessful looked into the empty space a long time. Barely more than enough, as Phobos and Deimos have been predicted much earlier, their official recognition, in particular, Jonathan Swift, who approached close to their exact description. It seems unbelievable, but empirical evidence shows that the two pieces of rock began to revolve around Mars for the first time in 1877 and returned to where they were before. Images "Mariner" show opening of the crater on Phobos, similar to the "neck" bottle, a regular shape, it is possible to believe in the artificial origin of the Martian moons. The report by NASA's Mars, as he sees the Mariner-9 ", a paragraph:" The mysterious canyons. "It was removed a huge mass of material originally present in these large cracks? Wind? But these masses moved rocks this is hardly an efficient way. These canyons are up to two kilometers wide, thousands of kilometers of length and, possibly, about 6 km - depth. Mars Phobos flies in less than one third the time of one rotation of Mars. This makes the planet Phobos unique in the solar system. Deimos (outer moon) spends about 5.5 hours more per revolution than the main planet to rotate around its axis. Russian astronomer Shklovskii and others have suggested that the Martian moons - artificial launched into orbit in early 1870 astronomer E. Holden said about a third satellite of Mars, which moves in contradiction to the third Kepler law of motion. This satellite was not seen by others.