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Most of them are named after characters from Greek mythology, such as Charon is named after Charon, the man who ferryed the River Styx, others such as Europa, Titan, Miranda, etc.
PS: Europa 1-4 is not called Galileo, but collectively as Galileo moons, because they were the first to be discovered when Galileo invented the telescope.
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Astronomers say the planet, nicknamed "Planet Nine," is more distant from the Sun than Pluto and the Sun. NASA has found "ironclad evidence" for the existence of "Planet Nine" in the solar system through mathematical modeling and computer simulation. So which are the nine planets in the solar system?
1. The nine planets (solar system) are the inner planets of the solar system, according to the distance from the sun, they are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, Pluto.
2. New astronomical discoveries have constantly called into question the traditional concept of the "nine planets", and American astronomers have misestimated the mass of Pluto and included Pluto among the nine planets. Later, it was discovered that Pluto had a lower mass than the Moon and was excluded from the nine planets. Astronomers have discovered some differences between Pluto and other planets in the solar system.
Pluto is in orbit beyond Neptune, in the Kuiper Belt on the outer part of the solar system, an area that has long been the birthplace of the solar system's asteroids and comets. Since the 90s of the 20th century, astronomers have discovered that Kuiper has more large bodies orbiting the sun. For example, the American astronomer Brown discovered "2003UB313", which is a celestial body with a diameter and mass greater than Pluto.
Therefore, it is not difficult to understand the change from "nine planets" to "eight planets".
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The planets with moons in the solar system are: Earth, Mars, Jupiter, Saturn, Uranus, Neptune.
The moon is the moon, Mars has two moons: Forbos and Demos, Jupiter has 63 moons, 40 have been named, and the remaining 23 have not yet been officially named, of which Europa is the largest moon in the solar system, Saturn includes a total of 56 moons that have been discovered and unnamed, 9 of which were discovered before 1900, Uranus has 27 moons, and Neptune has 13 moons, all of which are officially named.
I also think that Pluto should not be counted among the nine major planets, in terms of size and orbital direction, it should be the moon of a large planet such as Neptune.
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Revolution. Because the sun attracts.
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