Planets and asteroids in the solar system orbit the sun, and satellites (natural satellites) orbit around planets and asteroids. The earth’s natural moon, the moon, is affectionately called the moon because of its chaste, bright and bright night sky. Everyone living on Earth knows that the Earth has a moon, but I don’t know that other big planets also have their own moons, and there is more than one, and even some asteroids have their own satellites. The moons in the solar system are diverse in shape and size. Most of them are without air, but there are also a few atmospheres and even hidden oceans. Among the eight planets, Mercury and Venus have no natural satellites, one on Earth, two on Mars, 79 on Jupiter, 62 on Saturn, 27 on Uranus, and 14 on Neptune. Let’s take a look at these different “moons”.
There is only one satellite in the earth, the moon. The moon is the fifth largest satellite in the solar system and is the only place where humans outside the Earth set foot. The moon is the brightest and largest celestial body in our night sky. It regulates the earth’s swing on its axis, making the climate relatively stable, making the earth a more livable planet. It also sparks the tide and creates a rhythm that guides humanity for thousands of years.
The origin of the moon is likely to be formed by a Mars-sized celestial body colliding with the Earth. It is only 1/4 of the diameter of the Earth, its mass is 1/80 of the Earth, its gravity is 1/6 of the Earth, and it is 385,000 kilometers from Earth. Although they are thousands of miles apart, we can also touch it. In addition to the meteorites that fell on the earth, the Apollo astronauts brought back 382 kilograms of lunar rocks and lunar soil for scientists to study. This is also currently on Earth. The only extraterrestrial sample returned by humans themselves.
Mars has two moons, their names are Phobos: Phobos and Deimos, one of the smallest satellites in the solar system. The size of Phobos is 27 × 22 × 18 km, slightly larger than Phobos (5 × 12 × 11 km). Its orbit is only 6,000 km from the surface of Mars. It rotates three times around Mars every day, so that it is on Mars. In some places, it can’t always be seen. Deimos, which is farther away, takes 30 hours to rotate around Mars.
Phobos is gradually spiraling inward, and each century will draw 6 feet (1.8 meters) to Mars. At this speed, within 50 million years, it will either crash into Mars, or disintegrate, and finally form around Mars. a ring. Phobos and Deimosy will always appear on Mars in the same way as the moon. They are also one of the darker objects in the solar system, with bumpy craters on the surface, dusty and loose rocks. Phobos and Phobos may be a mixture of carbon-rich rocks and ice by impact, or they may be captured asteroids.