Why does the earth rotate around the moon and the earth does not rotate, and why? The Moon does not

The Moon is a satellite of the Earth.

Of course, it will revolve around the earth.

Because the earth has a gravitational pull.

The Moon is smaller than the Earth.

So the moon will revolve around the earth.

Sputnik will too.

In fact, the principle is the same as the earth revolving around the sun.

Of course, the moon also rotates.

The Moon is rotating, of course, and oddly enough, its rotation is at the same frequency as its revolution around the Earth.

Other words. As it orbits the Earth, it always faces the Earth with one of its aspects, which means that you will always only see this side of the Moon. See.

It's also turning. However, its revolution period is the same as its rotation period.

Who said the moon doesn't spin??

The Moon both revolves and rotates.

Almost all celestial bodies in the solar system, including asteroids, rotate according to the law of the right-hand rule, and the rotation of all or most celestial bodies is also the right-hand rule. Why? The predecessor of the solar system was a dense cloud, driven by a certain force that caused it to attract each other, and this accretion process made the density gradually larger, which accelerated the accretion process.

On the one hand, the centripetal accretion accumulation becomes the sun, and on the other hand, the gas gradually develops into a flattened shape, and in the process of development, the potential energy becomes kinetic energy, and finally the whole thing turns. At the beginning of the rotation, there are those who turn this way, and those who turn that way, after a certain direction prevails, they all become one direction, and this direction is the right-hand rule that is now discovered, and there may be other solar systems that are left-handed rules, but in our solar system it is the right-hand rule. The energy of the earth's rotation** is caused by the eventual transformation of material potential energy into kinetic energy, which ultimately means that the earth rotates on the one hand and rotates on the other.

In the universe, friction is almost non-existent, so if a movement is not stopped by an external force, it will move forever. (i.e. inertia).

The rotation period of the Moon is exactly the same as the rotation period, so the Moon is always facing the same side towards the Earth, and the shadow of the Moon that we observe is the same.

If the moon does not rotate, the angle of the surface facing the earth will change by 12 degrees every day, which will definitely be different.

The Earth and the Moon form a celestial system called the Earth-Moon system. In the Earth-Moon system, the Earth is the central celestial body, so the movement of the Earth-Moon system is generally described as the orbital motion of the Moon towards the Earth. Here's the details I've put together, let's take a look!

The Earth and the Moon revolve around each other's Earth-Moon centers – this center is in the Earth's interior, so it looks like we think the Moon revolves around the Earth.

The direction of the revolution is from west to east, that is, from the north pole of the earth, the moon rotates counterclockwise around the earth, and from the south pole of the earth, the moon rotates clockwise around the earth. The revolution period is a little over 29 days.

The Moon rotates in a direction from west to east. That is, the rotation and revolution of the moon are the same. The rotation period is also a little more than 29 days, so the moon always rotates on one side towards the earth.

That is, the moon is like a synchronous satellite of the earth.

The mass of the earth is about 81 times that of the moon, and the gravitational pull of the sun on the earth should be 81 times that of the moon, and the gravitational pull of the moon on the wax belt earth is numerically equal to the gravitational force of the earth on the moon, that is, the gravitational force of the sun on the earth is 162 times that of the moon on the earth.

Revolution of the Moon

The Moon orbits the Earth in an elliptical orbit. The large circle of this orbital hall chain plane on the celestial sphere is called the "white path". The plane of the white channel does not coincide with the celestial equator, nor is it parallel to the plane of the ecliptic, and the spatial position is constantly changing.

Cycle day. The average inclination of the lunar orbit (white path) to the Earth's orbit (ecliptic) is 5°09. But it is known that the Moon is gradually departing from the Earth at an average rate every year.

The rotation of the moon

The Moon orbits the Earth while making its own orbit, and the cycle day happens to be a sidereal month, so we can't see the far side of the Moon. This phenomenon is called "synchronous rotation", or "tide locking", and is almost a universal law in the world of solar system satellites. It is thought to be the result of the long-term tidal action of satellites on planets.

The balance movement is a wonderful phenomenon that allows us to see 59% of the surface of the moon. There are mainly the following reasons:

1) In different parts of the elliptical orbit, the rotation speed does not match the angular velocity of the revolution.

2) The intersection of the white and equator.

The Moon moves half a degree per hour relative to the background starry sky, i.e. it is similar to the apparent diameter of the Moon's surface. Unlike other satellites, the Moon's orbital plane is closer to the ecliptic plane than near the Earth's equatorial plane. The time it takes for the Moon to orbit the Earth (one sidereal month) is called a sidereal month, relative to the background starry sky; Whereas the time it takes for a new moon to take for the next new moon (or between two phases of the same moon) is called a synodic month.

The synodic moon is longer than the sidereal moon because the Earth itself travels some distance in its orbit around the Sun during its orbit.

Compared with distant stars, the rotation period of the Moon is approximately equal to the orbital period and the direction is the same, so there is almost no rotation relative to the Earth.

It is very special for the relationship between planets and moons, but due to the particularity of the earth and the moon, the two may go through a period of "running-in" and finally form this unique relationship between rotation and revolution.

The Moon is a satellite belonging to the Earth's satellite system and is the only satellite on our Earth. Like the moons of other large planets, the Moon also has a revolution phenomenon, which is a natural law, and any satellite object is no exception. The movement of the Moon around the Earth does not always face the Earth.

It is not correct to say that the moon is always facing the earth. This may be the illusion that the lunar surface environment and reflectance are the same.

Because the surface of the moon is the same environment and reflectivity, no matter how the moon rotates and revolves, it will have the same visual response and no different changes. So when viewed from the earth, it looks like the illusion of always facing the earth. In fact, this statement is an original error.

The Moon is about 380,000 kilometers away from our Earth, making it the brightest object we can see in the night sky.

Whether it is the story of Chang'e flying to the moon or the laurel jade rabbit; Whether it is Su Shi's "When is the bright moon, ask for wine from the sky" or Zhang Yu's interpretation of "I admit that it is the moon's fault, the moonlight is too beautiful, you are too gentle" and so on, all add a mysterious color to the moon in the sky. As for the moon, it is also the material of ancient poets, leaving many popular verses, and people today do not see the ancient moon, but this month was like the ancients.

The bright moon in the Qin period, the bright moon in the Han period, and the tidal changes of the earth are mutual, which means that the earth can also make the moon tidal change, although there is seawater on the moon, but there is molten slurry on the moon in the early days, so the earth can make the moon tidal changes to achieve the purpose of slowing down the moon. There are rocks on the moon. Under the influence of the Earth's gravity, these things change the shape of the Moon, allowing it to slowly turn into an ellipse.

As a satellite of the earth, the moon has accompanied our earth for billions of years, why does the earth have such a large moon to accompany it? There are currently some theories that shortly after the formation of the solar system, a protoplanet the size of Mars collided with our Earth and eventually created a moon. The possibility exists.

On the one hand, in the early days of the solar system, the solar system was chaotic, with all kinds of celestial bodies and debris, and even some planetary embryos.

Because of the tidal locking phenomenon and the fact that the moon has the same rotation and rotation period, the moon can of course rotate.

Since the side of the Moon towards our Earth does not change, the Moon as seen on our Earth does not seem to rotate. In fact, the moon has been rotating and revolving, but because of the omission of its rotation, the return of the ball so we see the lunar chain dust as if it does not rotate.

Because the rotation speed of the earth is the same as the rotation speed of the moon, it seems that the ruler socks have not changed, but in fact, the moon is also rotating, but the rotation is too small.

Moon. They revolve around the Earth because the gravitational pull between them acts by providing the centripetal force of the Moon around the Earth.

In other words, the reason why the moon can revolve around the earth is because of the gravitational force, which pulls the moon around the earth, and as for whether they will collide with each other, I don't think it will be for a long time.

But those that collide may not collide because of the Earth-Moon distance.

is increasing, and the Earth's gravitational pull on the Moon is decreasing.