Why does the moon become very round during the Mid Autumn Festival 10

On the first day of the lunar month, when the moon moves between the sun and the earth, the moon faces the earth with its dark side, and rises and falls with the sun, so people cannot see it. The phase of the moon at this time is called the "new moon" or "new moon".

After the new moon, the moon gradually moves out of the area between the earth and the sun, and then we begin to see a small part of the moon illuminated by the sun, like a curved eyebrow, so the moon phase at this time is called "the moon of the eyebrow". This "crescent moon" can only be seen in the western sky in the evening.

Around the eighth day of the lunar calendar, the moon has moved to a 90° angle east of the sun as seen from the earth. At this time, we can see the bright half of the moon to the west, and the moon phase at this time is called "winding". The first quarter moon can only be seen in the first half of the night, and it submerges into the west in the middle of the night.

After the winding, the moon becomes fuller day by day, and we can see most of the bright hemisphere of the moon, and the phase of the moon at this time is called "gibbous moon".

It's time for the lunar calendar. Ten.

At 5 or 16 o'clock, the moon runs on the celestial sphere to the opposite side of the sun, and the sun and the moon are 180 degrees apart, that is, the earth is located between the sun and the moon. The full moon rises in the east at dusk and sinks west at dawn.

After the full moon, the moon becomes "thin" as the sun and moon positions get closer. It goes through the gibbous moon, the last quarter and the crescent moon in turn, and finally, returns to the position of the new moon. In China, it is customary to call the "Moon" in the second half of the month "the waning moon".

The first and second quarters, the waxing crescent and waning moons are similar in appearance, but they appear at different times, in different positions, and in the direction of their bright surfaces. The crescent moon and the first quarter moon appear in the western sky in the evening and the first half of the night, respectively, and their "faces" are facing west, that is, the western half is bright; The waning and last quarters appear separately.

In the eastern sky at dawn and in the second half of the night, their "faces" are facing east, i.e., the eastern half is bright. Since the date of the lunar calendar in China is arranged according to the phases of the moon, the working people of ancient China sometimes relied on it to judge the date of the lunar calendar and the approximate time of the night.

The average time it takes for the moon to move from the new moon position to the time it returns to the new moon position is days, that is, the average period of change in the phases of the moon is days, which is called a "synodic month".

The earth is rotating, the moon's light is shining at an angle to the earth, and when other planets block the moon's light, it will be "one less piece", and in the Mid-Autumn Festival, it happens to be when the moon's light hits the earth directly, so the moon will become very round during the Mid-Autumn Festival.

Hope. o(oThank you.)

The Moon orbits the Earth in an elliptical orbit, taking an average of 29 days, 12 hours and 44 minutes from one full moon to the next. When "looking", the moon, the earth, and the sun are closest to a straight line, so the moon is also the roundest and brightest. However, due to the speed of the moon is fast and slow, the time of arrival at "Wang" is different each time, mostly in the early morning of the 16th or even 17th day of the lunar calendar.

There are also a few on the fifteenth day of the lunar calendar, so there is an old saying that "the moon of the fifteenth is sixteen round".

Because of the scientific truth, it is okay not to say it.

A noble woman must be Jia Yueting.

Why do you say women also have menstruation during the Mid-Autumn Festival? Cycles.

The moon has a profit and loss, and the bright moon of the Mid-Autumn Festival is the largest and roundest day of the year, so it is a special time point; On this day, the earth and the moon are in the same line, and the earth is sandwiched between the moon and the sun, and the combined force of gravity between the two reaches the maximum. This day is the fifteenth day of the eighth month of the lunar calendar, the full moon in the middle of the sky, the Mid-Autumn Festival in the world; Because of the tidal action of gravity, the body's qi and blood are the most abundant and the most changing.

In life, we can take this opportunity to amplify the happiness of the festival atmosphere, and in the middle of body cultivation, we must also take the opportunity of natural transformation to nourish the qi and blood sufficiently.

The calendar, also known as the lunar calendar, is based on the moon's orbit around the earth for one month. Due to the blocking of the sun's rays by the earth, we can only see the full moon around the fifteenth day of the lunar calendar in a month on earth. As for the Mid-Autumn Festival, the autumn is high and crisp, and the air is exceptionally fresh, so the ancients believed that the moon in the Mid-Autumn Festival was the roundest and brightest.

So there was the later Mid-Autumn Festival moon appreciation, which was extended to express the wish for reunion. It seems to be like this.

Every month of the lunar calendar is round, and the moon in the Mid-Autumn Festival will not be rounder and brighter than at other times.

I guess that the ancients were about to harvest in the autumn, and they could rest and enjoy the fruits of the year's work, so that the mood would be very comfortable, so it would be more pleasing to the eye to see the moon.

The moon itself is round. There are holidays. There is a delicious enjoyment. Then the moon will naturally be rounder.

1. From a meteorological point of view.

At this time, due to the cold and dry air flow from the north, the warm and humid air that has been circling over our country in summer is forced to retreat, so the clouds and fog in the weather are gradually reduced, and the inclination of the sun is gradually larger, and the ground gets solar heat and gradually decreases, and the temperature will be lower day by day, and the autumn wind usually makes the water vapor lower and the air transparent. As a result, the night sky is usually brighter, and the moonlight is usually brighter.

2. From an astronomical point of view.

The moon is not always only in the middle of the year. Because the moon usually reflects the sun's light to brighten, so from the moon, the strength of the moonlight should be related to the size of the moon's reflective surface, and the moon's distance from the earth is related to the moon's distance from the sun.

And the Moon usually revolves around the Earth, and the Earth's orbit is elliptical. And the nearest location is not necessarily fifteen. The first day of the lunar calendar is usually fixed"Shuo"，"Hope. "It depends on the movement of the moon and usually occurs in the lunar calendar.

Ten. Five, sixteen, two days, or even seventeen (such as this year); In addition, the Earth's orbit around the Sun is also elliptical, and perihelion is generally on the lunar calendar.

Ten. January, December, not August.

According to meteorological experts, from a meteorological point of view, whenever this time, the dry and cold air blowing from the north forces the warm and humid air that has been circling over most parts of our country in summer to retreat to the south, and the clouds and fog in the sky are reduced, reducing the occlusion of the moon.

At the same time, the inclination of the sun becomes larger, the ground receives less solar heat, the temperature is lower day by day, the autumn wind reduces the water vapor, the relative humidity of the air is small, and the condensed dust is also less, so the air is transparent, the night sky is like washing, and the moon appears extraordinarily bright.

But from an astronomical point of view, the moon doesn't have to be distinct only in the Mid-Autumn Festival. The moon is bright when it reflects the sun's rays, and when the moon reflects the sun's rays on the largest and nearly circular, the moonlight should be the brightest, reaching its fullest at 19:13 on the fifteenth day of the lunar month in 2013. It can be seen that the saying that "the moon to the Mid-Autumn equinox is bright" contains a certain kind of sustenance and feelings of people.

Fifteen moon sixteen round:

The moon is cloudy and sunny, so that the cycle of the moon's waxing and waning is called a 'synodic month' in astronomy, that is, the cycle of the moon's movement. The average time experienced by such a cycle is days.

But this number is only an average. The speed at which the moon orbits the earth is sometimes a little faster, sometimes a little slower. Such a cycle can be as long as it is 29 days and nearly 20 hours more, and a shorter cycle may be only a few minutes longer than 29 days.

In addition, the standard of the lunar calendar is that "Shuo" must be the first day of the new year, and after "Shuo", it takes about 14 days and 18 hours to reach "Wang", that is, the time of the full moon. Therefore, if the "Shuo" is in the early morning of the first day of the new year, then the "hope" should be on the evening of the fifteenth; And when "Shuo" appears relatively late on the first day of the new year, "hope" will also be delayed.

Considering the above factors, due to the change of the synodic month, the full moon may occur on the 15th lunar month, the 14th or 16th lunar calendar, and even the 17th lunar month.

Example 15 comes to the 15th of the lunar calendar, and then the moon of 15 is 16 yuan, which is also a high tide.