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Anonymous users2024-02-15Orbiting the Earth. The moon is also known as the sun yin, commonly known as the moon. It is the only natural satellite of the Earth.
The Moon is the most obvious example of a natural satellite. In the solar system, except for Mercury and Venus, all other planets have natural satellites. The age of the Moon is about 4.6 billion years.
The Moon has a layered structure such as a shell, mantle, and nucleus. The average thickness of the outermost lunar crust is about 60-65 km. Below the lunar crust to a depth of 1,000 km is the lunar mantle, which occupies most of the moon's volume.
Underneath the mantle is the lunar core, which is about 1000 degrees warm and most likely molten. The diameter of the Moon is about 3476 km, which is 3 11 of the Earth and 1 400 of the Sun. The volume of the Moon is only 1 49 of the Earth, and the mass is about 735 billion tons, which is equivalent to 1 81 of the mass of the Earth, and the gravity of the surface of the Moon is almost 1 6 of the Earth's gravity.
There are dark parts and bright areas on the surface of the Moon. When early astronomers looked at the moon, they thought that the dark areas were covered by seawater, so they called them "seas". The famous ones are the sea of clouds, the wet sea, the still sea, etc.
The bright part is the mountains, which are dotted with craters. Located near Antarctica, the Bailey crater is 295 kilometers in diameter and can fit the entire island of Hainan. The deepest mountain is Newton's crater, which is 8,788 meters deep.
In addition to craters, there are also ordinary mountains on the lunar surface. Mountains and deep valleys are stacked on top of each other, creating a unique scenery.
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Anonymous users2024-02-14The Moon revolves around the Earth from west to east, that is, from the sky above the Earth's North Pole, the Moon revolves counterclockwise around the Earth; Viewed from the Earth's south pole, the Moon rotates clockwise around the Earth. In addition to its revolution, the Moon is also rotating from west to east. That is, the rotation and revolution of the Moon are the same.
In this way, the Moon is always facing the Earth with one side, and the Moon is like a synchronous satellite of the Earth.
Some areas on the moon are called "moon seas", but they are not really seas, but relatively low-lying plains on the moon. At the beginning of the 17th century, when Galileo Galilei observed the moon with a telescope, he discovered that there were large dark areas on the moon, which he did not know at the time were plains, and mistakenly called those places "sea", a name that is still used today. Now, there are 22 moon seas that have been identified.
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Anonymous users2024-02-13The earth revolves around the sun, and the moon revolves around the earth. As the Earth rotates, it also revolves around the Sun, along with other celestial bodies. The force of the earth's revolution is the rotation of the sun, that is, the axis drives the wheel to turn.
As the Earth rotates, it also revolves around the Sun. The movement of the earth around the sun is called the revolution of the earth. Because the Earth orbits the Sun along with other celestial bodies in the solar system, the Sun is the central body they share.
The direction of the revolution is also from west to east, and the time for one revolution is one year. Therefore, the rotation of the sun will also bring us the change of the four seasons, spring, summer, autumn and winter.
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Anonymous users2024-02-12The Moon orbits the Earth from west to east, and the Moon orbits the Earth in an elliptical orbit.
The rotation period of the Moon is equal to the rotation period, that is, 1:1, and the time for the Moon to revolve around the Earth is 27 days, 7 hours, 43 minutes and 11 seconds, which is the period of its rotation. When the moon rotates, the center of gravity deviates outward under the action of centrifugal force, but the center of gravity shifts inward under the gravitational force of the earth.
The Moon completes its rotation around its own axis under the action of these two forces.
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Anonymous users2024-02-111. On the one hand, the solar nucleus rotates at a speed of 250 kilometers per second around the center of the Milky Way, with a period of about 250 million years, and on the other hand, it moves at a speed of 19.7 kilometers per second relative to the surrounding stars in the direction of Vega. At the same time, the sun is also rotating, and its cycle is about 25 days in the equatorial zone of the sun; The polar region is about thirty-five days.
2. The Moon orbits the Earth in a circular orbit with the middle finger of the elliptical. At the same time, it rotates at the same time, with a period of about 27.32166 days, which happens to be a sidereal month.
3. The earth revolves around the sun, and its orbit is in the shape of an elliptical orbit that is nearly perfectly circled, with a period of about 365.25 days; At the same time, it rotates around the Earth's axis, and the chain matching period is about 23 hours, 56 minutes and 4 seconds, which is called the sidereal day.
Don't say that Earth is a terrestrial planet. Because the standard is artificially formulated, the purpose is only to facilitate classification, and the earth is the reference standard used by the general astronomical community to classify other planets, such as Mars is a "terrestrial planet", the so-called terrestrial planet refers to: extraterrestrial planets that have some similar characteristics to the earth, such as volume, weight, constituent elements, atmosphere and other characteristics of the environment is close to the earth. >>>More
In China, the record of the appearance of the month is at the time of Emperor Jun, and before Emperor Jun, there is no record of the month. There is an ancient legend of the Yao people in China, which says that the moon suddenly appeared at a certain time in human beings, not always in the sky. The history of mankind is only a few hundred thousand years, and the history of human memory is even shorter, only tens of thousands of years.
There is a widely accepted theory of the formation of the moon that is called"The Great Collision Theory"or"Rain Stone Theory"。According to this theory, about 4.5 billion years ago, shortly after the formation of the Earth, a Mars-sized celestial body called Theia collided with the Earth, and the collision was thought to be very large and violent. >>>More
A lunar rover is a specialized vehicle that can travel on the lunar surface and complete complex tasks such as lunar exploration, investigation, collection and analysis of samples. In the laboratory, the scientific name of this important role is the "lunar rover", in order to make the lunar rover can drive smoothly on the lunar surface, the United States, the former Soviet Union has launched a series of satellite exploration, and repeated scientific experiments on the lunar environment, Tankikong has laid a reliable foundation for the success of carrying the lunar rover on the probe. < >>>More
It is natural, but there are many bizarre lunar phenomena, such as the age of the lunar rocks, the hollow structure of the moon, the gravitational distribution of the moon, the front and back of the moon, ......Some people say that the moon was created by aliens, which is not impossible, but it is too unrealistic, and it is very laborious to build such a large moon. It is likely that the original appearance of the moon was not like this, but was modified by extraterrestrial intelligent life, which is both natural and artificial, but this man-made is still based on nature, so the moon is still a product of the universe in the final analysis, and its mysterious phenomena will always be picked up to get scientific explanations.