The change of the moon, what is the reason for the change of the moon

Since the moon itself does not emit light, the half of the sphere facing the sun is a bright area, and the other half of the sphere is a dark area. As the position of the Moon changes relative to the Earth and the Sun, the illuminated side of the Moon is sometimes facing the Earth and sometimes facing away from the Earth;Sometimes the part of the moon facing the Earth is larger, sometimes it is smaller, so that different phases of the moon appear.

Whenever the moon orbits between the sun and the earth, and the hemisphere illuminated by the sun is facing away from the earth, people cannot see the moon on the earth, and this day is called the "new moon", also called the "new moon", which is the first day of the lunar calendar.

After the new moon, the moon follows the direction of the earth's rotation, the bright area gradually turns to the earth, and the moon can be seen on the earth showing a trace of slender silver hook, appearing in the western sky, bowing its back towards the sunset, this moon phase is called "moth eyebrow moon", this is the beginning of the lunar calendar.

Three, four. Subsequently, the moon moves away from the sun in the sky day by day, at the beginning of the lunar calendar.

On July and August, half of the bright area facing the Earth, one can see the half moon (convex facing west), and this phase of the moon is called the "first quarter moon".

When the Moon moves in the direction of the Earth's back sun, the lunar calendar.

Ten. Five, ten.

On the sixth and seventeenth, the bright areas of the moon are all facing the earth, and we can see a full moon, and this phase of the moon is called the "full moon", also called "hope".

The first to the thirtieth day of the lunar calendar.

The first half of the month;New Moon - Emei Moon (see on the right) - First Quarter Moon (bright on the right) - Gibbous Moon --- Full Moon.

Second half of the month;Full Moon - Gibbous Moon --- Last Quarter Moon (visible from the left) - Waning Moon (bright on the left) - New Moon I hope it will help you.

The reasons for the change of the moon are as follows:

The reason for the change in the phases of the moon is related to the nature of the moon itself and the relative position of the moon, the earth, and the sun. The moon itself does not emit light, and when illuminated by the sun's rays, the half of the sphere facing the sun is a bright area, and the other half of the sphere is a dark area (blocked by itself). As the position of the Moon changes relative to the Earth and the Sun, the illuminated side of the Moon is sometimes facing the Earth and sometimes facing away from the Earth;Sometimes the part of the moon facing the earth is larger, sometimes it is smaller, so there are different phases of the moon.

Influence of the Moon on Earth:

The first aspect is lighting, the earth can rely on the moon to illuminate the night, some time ago my country launched an artificial moon to illuminate Chengdu, and there are some biological clocks, which are necessary.

The second aspect is the tides: the same gravitational pull that the Moon has on the Earth, which gives the Earth a slightly elliptical shape, and this deformation has little effect on the solid land, but causes tides along the coastline.

Tides, in turn, affect the speed of the Earth's rotation and the distance from the Moon, with two high and low tides per day on the surface of the Earth as it enters and exits the zone of expansion caused by the Moon's gravity. The actual height of the tides depends on the position of the Moon in its orbit and also on the local topography.

The third aspect is the gravitational force of the moon: Dr. Sheroux Pearson, a scientist at NASA, pointed out that when the solar system was first formed, the moon was pulled by the earth and became its satellite, and the moon had a great impact on the earth in the process of being pulled closer to the earth, and the moon had a tidal attraction effect on the earth.

Moon. Revolution around the Earth. The phenomenon of the moon's circle and lack is actually how much of the moon's bright part is seen on the earth when the moon orbits the earth. The Moon orbits the Earth every month.

week, therefore, the area of the light-receiving part of the moon that can be seen every month on Earth is sometimes large and sometimes small.

Taking the Earth as a reference, the Moon orbits the Earth from west to east in an elliptical orbit. Strictly speaking, it is not around the Earth, but around the center of mass of the Earth and the Moon.

Turn. The Moon's orbital period is 1 month. The Moon is also rotating, and the direction and period of rotation are the same as its revolution.

This is known as the synchronous rotation of the Moon. Due to the synchronous rotation, only half of the Moon can be seen from Earth, and the other side of the Moon can never be seen.

The moon revolves around the earth, and at the same time, it will change its own rotation, so it is said that it will change frequently.

The change of the moon is the new moon - the crescent moon -First Quarter Moon- Wax and convex - full moon - Lost convex - last quarter moon - waning moon - new moon

On the first day of the lunar calendar, the moon.

Running between the Earth and the Sun, the illuminated hemisphere carries the Earth on its back, and we can't see the Moon, called"New Moon", also called"Shuo"。

After the new moon, the illuminated part gradually turns to the earth, at the beginning of the lunar calendar.

Three, four, we can see a hook crescent moon, called"Eyebrows"；Beginning.

Seven, eight, see the half moon (convex edge to the west), called"First Quarter Moon"；On the fifteenth or sixteenth day of the lunar calendar, the bright side is all facing the earth, and then we see the round moon, called"Full Moon", also called"Look"。

From then on, the bright part of the moon was lost day by day, and it was time for the lunar calendar.

Two. Ten. 2. 23 And I saw a half moon (convex to the east), which was called"Last quarter moon"；Another week, back again"Shuo"。Moon phases.

And so it keeps changing. From "Shuo" to "Shuo" or from "Wang" to "Wang", the average period experienced is 12:44 minutes and seconds on the 29th, which is called one"Synodic month"。

Identification method

Assuming that the Full Moon is a circle, then no matter how the moon phases change, the line connecting its upper and lower vertices must be the diameter of the circle (lunar eclipse).

when the moon phase is irregular).

When we see the outer edge of the moon phase close to the shape of the reverse C, then the moon phase at this time is the moon phase before the 15th day of the lunar calendar, on the contrary, when we see the outer edge of the moon phase is close to the shape of the C letter, then the moon phase at this time is the moon phase after the 15th day of the lunar calendar.

The laws of the moon are:

1. On the thirtieth day of the lunar month or the first day of the lunar month, the moon.

Located between the Sun and the Earth.

People on Earth happen to see the dark side of the Moon away from the Sun, so they can't see the Moon on Earth, which is called the New Moon or New Moon. This moon phase.

Rises and sets with the sun, that is, the moon rises in the early morning and sets at dusk, only in a solar eclipse.

to be aware of its existence.

2. After the new moon, the moon revolves eastward around the earth.

As a result, the Moon moves away from the middle of the Earth and the Sun and deviates to the side, i.e., the Moon is located to the east of the Sun.

3. At the beginning of each lunar month.

On the seventh and eighth day of the first lunar month, as the Moon continues to orbit eastward around the Earth, the relative positions of the Sun, the Earth, and the Moon become right angles, that is, the line between the Moon and the Earth and the Sun and the Earth are 90°.

4. Every month in the lunar calendar.

Ten. 1. 12, the observer on earth.

Seeing that the west side of the moon is more than half illuminated by the sun, the moon phase becomes a gibbous moon. The gibbous moon rises after noon and is dusk in the southeastern sky, with the moon facing west, and then continues westward from the western horizon before dawn.

Falling, visible for most of the night.

5. Lunar monthly.

Ten. 5. 16. The Moon orbits to the outer side of the Earth, that is, the Sun and the Moon are located on both sides of the Earth.

Lunar Eclipse Phenomenon:

In the case of Earth, when a lunar eclipse occurs, the orientation of the Sun and the Moon will differ by 180°. It should be noted that since the orbits of the Sun and the Moon in the sky are not in the same plane, but have an intersection angle of about 5°, only if the Sun and the Moon are near the two intersections of the ecliptic and the white path, respectively, will have a chance to join in a straight line and produce a lunar eclipse.

Since the Earth's umbra is much larger than the Moon, this also means that a total lunar eclipse is occurring.

, the Moon will completely enter the Earth's umbra zone, so there will be no annular lunar eclipse.

Lunar eclipses generally occur twice a year, with a maximum of 3 occurrences and sometimes none at all. Because in general, the Moon passes either above or below the Earth's umbra, rarely passing through or partially passing through the Earth's umbra, so a lunar eclipse generally does not occur.

New Moon – Waxing Crescent Moon – First Quarter Moon – Wax and Convex Moon – Full Moon – Deficit Moon – Lower Quarter Moon – waning Moon – New Moon, and so on, the moon phase changes are cyclical, and the cycle is about one month.

The cycle of the phases of the moon is the day, called a synodic month, which is the ** of the month and week in the calendar. This time is longer than the time it takes for the Moon to revolve (sidereal moon), because when the Moon revolves around the Earth, the Earth also revolves around the Sun, and a synodic moon The Moon orbits about (360+360* degrees (the revolution only orbits 360 degrees). So a sidereal month is approximately * 360 = days.

Observe and observe the optical engineering of Huacheng Square and observe the process of eating and storing.

The moon does not change, and by change you mean the reflective area of the sun shining on the moon as received by the naked eye. You can pay attention to the fact that the moon is always facing the earth.