The moon is a satellite of the Earth, why are there artificial satellites?

Sputniks are satellites that we build according to our needs, and we can use them to help us live better in our daily lives and allow us to study celestial bodies better.

Because human beings are exploring the universe and constantly releasing artificial satellites to explore the planets, there will be artificial satellites.

Because artificial satellites are mainly used in various fields such as scientific exploration and research, land resource survey, weather forecasting, land use, regional planning, communication, tracking, and navigation. It is a symbol of scientific and technological development and progress.

Since ancient times, the moon has been full of magical colors. Legend has it that there is a jade rabbit pounding medicine in the moon shell, a young man named Wu Gang of the World Slippery Chain who keeps cutting down trees, and a beautiful fairy Chang'e who lives in ......the Guanghan PalaceThese legends and stories all show people's beautiful fantasy and yearning for the moon.

Over the past 100 years, with the continuous development of telescopes, we have slowly learned that the Moon is the only satellite of the Earth, about 380,000 kilometers from the Earth, and a quarter of the diameter of the Earth. One revolution of the Moon is the same as one revolution around the Earth, which is 27.

3 days, so you can only see the front side of the moon on Earth forever. In the 20th century, scientists continued to work hard to explore the moon, and finally on July 16, 1969, the Apollo spacecraft was launched, making the first successful landing on the moon. The rocks brought back from the moon and the information about the moon really revealed the secrets of the moon, and made the Sosun people believe that in the near future they will be able to build a permanent city on the moon closest to the earth, called the space city on the moon.

The size of the Earth is 49 times that of the Moon, with a diameter of 6,378 kilometers and the Moon 1,738 kilometers. The Earth is a multiple of the diameter of the Moon.

The mass of the Moon is approximately equal to 1 of the mass of the Earth. The average density of lunar matter is grams per cubic centimeter, which is only 3 5 of the Earth's equilibrium density. The average distance between the Moon and the Earth is about 380,000 kilometers, which is about 30 times the diameter of the Earth.

The Earth and the Moon orbit each other, and the two celestial bodies rotate around a common center of gravity 1,600 kilometers below the surface. The birth of the moon has added a lot of new things to the earth.

Extended Materials:

The average diameter of the Earth is 1,756 kilometers, the diameter of the Earth's equator is 12,756 kilometers, and the diameter between the north and south poles of the Earth is 12,631 kilometers. The diameter of the sun's reeds is 10,000 kilometers, which is 109 times that of the earth.

The Moon is the only natural satellite of the Earth, 384400km away from the Earth, with a radius of 1738km, which is equivalent to the Earth's radius, and the diameter of the Moon is 3476 km, which is equivalent to 1 4 of the Earth, and about 1 400 of the Sun, that is, the diameter of the Sun is 400 times the diameter of the Moon.

Because the Moon is a celestial body orbiting the Earth.

According to the definition of astronomy, any celestial body that orbits a planet can be called a satellite, so the Moon, as a virtual celestial body orbiting the Earth, is naturally also one of the Earth's satellites. The gravitational pull between the Moon and the Earth pulls the Moon towards the Earth, and at the same time causes the Moon to move in an elliptical orbit around the Earth.

The Moon is a satellite of the Earth because it orbits the Earth, affectionately called a satellite, and the structure of the Moon is similar to that of the Earth, with no water and air, earth and rock structure, and is not a machine. Artificial satellites are machines composed of precision instruments that have been pushed into space by rockets, are small in size, and also orbit the earth, and are machines controlled by humans. The diameter of the moon is 1 4 of the earth, such a large [moon], which cannot be controlled by humans, and the possibility of migration is still being studied.

Artificial satellites are different from the Moon, which is a tool of human beings and is not a natural phenomenon, while the Moon is a natural phenomenon and is not a tool of human beings and cannot play the role of artificial satellites.

Moon.

The names of the high-end of the moon are: Chanjuan, Wangshu, fiber, cover group Jinbo, jade bow, Guidian, group fan, cinnamon, Yintai, Wuyang, luminous, Qingguang, Taiqing, jade toad, frost toad, Su toad, ice toad, silver toad, Yao toad, toad palace, round toad, golden toad, toad, Su Lu, round Lu, ice Lu, Gui Lu, Yao Lu, jade plate, gold plate, silver plate, disc, Guanghan, frost plate, crystal plate, white jade plate, etc.

The Moon is a spherical celestial body that orbits the Earth and is also the only natural satellite of the Earth. In Chinese, it is commonly known as the moon or moon, and in ancient times, it was also called Taiyin, Xuantu, Chanjuan, and Yupan. The Moon is the fifth largest moon in the solar system, with an average radius of about one kilometer, which is twice the radius of the Earth.

Legends about the moon:

1. Jade rabbit pounding medicine.

Legend has it that three immortals turned into three poor old men who begged for food from foxes, monkeys, and rabbits, and both the foxes and monkeys had food to help, but the rabbits were helpless. Then the rabbit said, "Eat my flesh!"

He jumped into the flames and cooked himself, and the gods were greatly moved, and sent the rabbit to the Moon Palace and became a jade rabbit.

2, Wu Gang cut Gui.

Legend has it that Wu Gang was originally a woodcutter in the mortal world, and he was obsessed with the way of immortals, but he never refused to concentrate on learning, so the Emperor of Heaven was furious, resided him in the Moon Palace, and demanded that he must cut down the laurel tree in order to forgive his sins. The height of the laurel tree is about 500 hail feet, Wu Gang will automatically heal after cutting for a period of time, day after day, Wu Gang's wish to cut down the laurel has not been achieved, and he continues to cut down.

3, Chang'e to the moon.

tells the story of Chang'e being forced by Xiaomeng, and in desperation, she flew to the Moon Palace after eating an immortal pill given to her husband Hou Yi by the Queen Mother of the West. After hearing the news of Chang'e's journey to the moon and becoming an immortal, the people set up incense tables under the moon to pray for auspiciousness and peace to the kind-hearted Chang'e. Since then, the custom of worshipping the moon during the Mid-Autumn Festival has spread among the people.

In addition to the Moon, the Earth is also home to many artificial satellites. These satellites are made by humans and sent into space for various purposes such as communication, navigation, scientific research, etc. In addition, there are some small bodies that have been temporarily captured on Earth, such as the asteroid 2020 CD3, known as the "Lost Asteroid", which was discovered in 2020 and temporarily captured by Earth's gravity and became Earth's prominent moon.

However, these temporary satellites will generally only stay around the Earth for a short period of time, and will eventually break away from the Earth's envelope force field and return to space.