Is the displacement of the moon around the earth zero and why

No, because the earth has moved in this month, it must have moved too, so its displacement relative to the earth is 0, and it has a displacement relative to the sun. So its position in the universe is changing, but our thinking will be fixed on the earth, so it can be said to be 0. If the field of view is larger, its displacement is not 0

This varies depending on the frame of reference, if the earth is chosen as the frame of reference (without considering the rotation of the earth), then the displacement is indeed zero, because the position of the beginning and the end is the same, (considering the rotation of the earth, the displacement is not zero, because the position of the earth changes) if the sun is chosen as the reference frame, the displacement is not zero.

It's not zero, the moon revolves around the sun with the earth, so the moon revolves around the sun 1 12 times while revolving around the sun.

Zero, of course.

The concept of displacement is, to put it bluntly, the straight-line distance between the start and end points. The moon goes around the earth and returns to its original starting point, and the displacement is zero, but the distance is not zero, the distance is the circumference of the trajectory it moves.

It's not zero, the displacement has a magnitude and direction, and the moon's orbit around the earth is not a fixed orbit, and there is a certain amount of offset gradually, and the magnitude and direction will change and will not return to the starting point.

The Moon orbits with a complete orbit with a period of days relative to a fixed star (its sidereal period). However, due to the Earth-Moon orbit.

Since the Earth also revolves around the Sun at the same time, it will be in the same aspect of the Earth for a longer time, about days (its conjunction period). Unlike most of the moons of other planets, the Moon's orbit is closer to the ecliptic plane than to the Earth's equatorial plane. The orbit of the Moon is subject to many small, complex and inexplicable perturbations between the Sun and the Earth, such as the gradual rotation of the Moon's orbital plane, which affects other states of motion of the Moon.

Cassini's Law mathematically accounts for the subsequent effects. Among them, the main orbital changes are: eccentricity change, orbital inclination change, arch line motion, intersection point westward retreat, and center difference.

Displacement refers to the distance from the starting point to the end point, the distance refers to the length of the path, the moon orbits the earth, it is from this point back to this point, the starting point is here and the end here or here, the displacement is zero, understand?

Around the Earth, the Moon returned to its original point without change, the distance is the circumference of the Earth, but the displacement has not changed.

Sky.

The moon revolves around the earth once in the sky. The cycle of the moon around the earth is also known as the "sidereal month", in addition to orbiting the earth, the moon itself is still rotating, the cycle of the moon's rotation is 27 days, 7 hours, 43 minutes and seconds, which is almost equal to the period of its revolution around the earth. The Moon is the Earth's natural satellite and one of the first planets to be discovered.

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 (called "moon" in astronomy.)

The time it takes to orbit the Earth is the Moon's orbital cycle.

The moon's orbital cycle is also called "one month", and there is a "synodic month."

and "sidereal moon".

A synodic moon is the Moon's orbit around the Earth.

Relative to the average period of the Sun. From the Earth, the Moon completes its moon phase.

The time of the cycle, which is the average cycle of the moon's waxing and waning. The average length of the time interval from the new moon to the next new moon or from the next time is the day, or 29 days, 12 hours, 44 minutes and 3 seconds. The synodic moon is not a true orbital cycle of the Moon.

A sidereal month is the period of rotation of the Moon to a distant star. That is, the time interval between the Moon and a distant star at the same time. The length of a sidereal month is days, or 27 days, 7 hours, 43 minutes, and seconds.

The sidereal moon is the true cycle of the moon's movement around the earth.

Sidereal moons have little to do with everyday life, and we generally use synodic moons. The synodic month is longer than the sidereal month, and the truth is the same as the solar day.

The length of the day-long than the sidereal is the same. In the diagram below, position B is the sidereal moon and position c is the synodic month. In a synodic month, the moon revolves a little more around the earth than a sidereal month, so the length of the synodic month is longer.

sidereal and synodic moons.

The real time of the moon orbiting the earth is days, which is the real time of the moon orbiting the earth, but because the earth itself is also orbiting the sun, the time when the moon orbits the earth and the sun at an angle is the day, which is the synodic month, so the lunar calendar is 30 days in the big month and 29 days in the small month, so the lunar calendar in China is formulated with reference to the operation of the moon.

The moon is a satellite of the earth, and the moon orbits the earth once a day, so it is a day.

1. The earth is a planet in the solar system, and the earth revolves around the sun, and one rotation is a year in the solar calendar.

2. The moon is a satellite of the earth, and the moon revolves around the earth, and one rotation is a lunar month.

3. The sun is the center of the solar system, occupying the overall mass of the solar system, and the eight planets, asteroids, meteors, comets, outer Neptune objects and interstellar dust in the solar system all revolve around the sun, and the sun revolves around the center of the Milky Way.

4. The earth is a planet in the solar system, and the moon is a natural satellite of the earth, and the planetary system composed of the earth and the moon revolves around the sun, thus producing the difference in the four seasons on the earth.

The moon must be right to revolve around the earth. The Moon revolves around the Earth because the mass of the Earth is much greater than that of the Moon, and the distance from the Moon to the Earth puts the Moon within the gravitational range of the Earth, so the Moon revolves around the Earth.

When the moon rotates, the center of gravity deviates outward under the action of centrifugal force, but the center of gravity deviates inward under the action of the earth's gravity, and the moon completes its rotation around its axis under the action of these two forces, and the moon actually rotates around its axis relative to the earth, so whether it is using the earth as a reference or using a star as a reference, the moon is relative to the earth.

The Moon revolves around the Earth and is a synodic month, which is 29 days, 12:44:3 seconds, and the Earth's orbit around the Sun is about 365 days. So there is such a relationship between the years, the months and the days.

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.

The Moon, that is, Equiladus, commonly known as the moon or moon, and was known as Taiyin, Xuantu, Chanjuan, Wangshu, etc., in ancient times, is the only natural satellite of the earth and the fifth largest satellite in the solar system.

With a diameter slightly larger than a quarter of the Earth and a mass of about 1 81 of the Earth, the Moon is the largest in volume and mass relative to the planets it orbits, and the second most dense moon in the solar system, after Europa.

The moon is thought to have formed about 4.5 billion years ago, shortly after the appearance of the Earth. There are several theories about its origins, but none of them can be fully plausible and flawless, the most widely accepted being the Great Collision Theory, which postulates that the Moon formed as a result of a huge impact between the Earth and the Mars-sized Theia.

Di Chi Chang Zheng Qiu is not revolving around the moon.

The Earth and the Moon rotate together around the center of the Earth and the Moon, and since this center is in the interior of the Earth, it looks like the Moon revolves around the Earth.

The direction of the Moon's revolution is from west to east, from the sky above the North Pole of the Earth, the Moon rotates counterclockwise around the Earth, and from the South Pole of the Earth, it appears that the Moon rotates clockwise around the Earth, with a period of a little more than 29 days.

The moon rotates from west to east, and the rotation period is a little more than 29 days, so the moon always rotates on one side towards the earth.

27 days, 7 hours, 43 minutes and 11 seconds.

The moon is about 380,000 kilometers away from the earth, the mass of the lunar liquid is about one-eleventh of the earth's mass, the moon revolves around the earth in 25 hours, it takes days to rotate along the orbit, it rotates once is also a day, from the last full moon to the next full moon takes days, it is inclined 5 degrees relative to the ecliptic, the orbit of the moon is elliptical, and the moon runs westward.