The moon is a natural satellite of a planet or even a planet. The moons have a very diverse surface. The composition of the surface depends on its past and also on possible volcanic activity. The moons are bodies of various shapes and sizes, usually smaller than planets. However, there are exceptions: the largest moon in the Jupiter solar system, Ganymede, or Saturn’s moon Titan, is larger than the planet Mercury. For the most months, gravity formed a nearby sphere. Smaller ones may have an irregular shape and resemble asteroids. It is possible that many small moons were indeed asteroids that were caught by the gravity of a planet as they moved through the solar system. The moons do not only orbit the planets – dwarf planets and asteroids can also have their own moons. The first moon discovered that did not orbit the planet was the Dactyl moon orbiting the planet 243 Ida.

The large moons of jovial planets are thought to have formed from the original protoplanetary disk by a similar process to the planets. It is believed that the nuclei of large planets were surrounded by separate disk-shaped nebulae. From this disk, months were formed by mass collection and shrinkage.

Most moons orbit in large, elliptical orbits with a high tendency to the equator of the parent planet. This phenomenon is characteristic especially for smaller months of irregular shape. Most of them also have a retrograde direction of circulation. Other, usually large moons, such as our Moon, orbit in a progressive direction along approximately circular nearby orbits with a slight inclination to the plane of the equator.

Many moons (including the moon) have a bound rotation, meaning that they are always facing the same side to their planet. The nearby large moons can cause solar eclipses on their planet.

Due to the fact that the moons are relatively small, they also have low gravity and are therefore unable to maintain a dense atmosphere. An exception is Titan, the moon with the densest atmosphere in the solar system.

Because the moons have only planets farther away from the Sun than Venus, their surface temperatures tend to be very low. The only exception is the volcanic moon Io. On its surface near the volcanoes, they reach temperatures of 1,230 ° C.

Volcanic activity does not occur on the moons, due to the fact that the moons are relatively small bodies, they have not been able to retain much internal heat since their inception.

The most famous moons are satellites of the planets of the solar system. The solar system contains at least 200 months, but this number is not final, as new moons are constantly appearing.

Mercury and Venus do not have moons, the Earth has one moon, it is called the Moon. Mars has two moons, Phobos and Deimos. Jovial planets have tens of moons.

According to a theory published in 1984, the Moon is the result of a huge collision of the Earth with a body the size of Mars in the early stages of its evolution. The collision hurled a huge amount of molten rock from both bodies into Earth’s orbit. The rocks formed a ring of hot material, from which the Moon formed at an original distance of about 20,000 kilometers from Earth. Since then, it has slowly moved away from the Earth and its distance continues to this day.

The discovery of months outside the solar system is not possible with the current level of technology.

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