Every first month, the fifteenth moon is so round, why is it so round?

Because the full moon can only be seen when the longitude of the moon and the sun are 180 degrees apart, when the moon and the sun are in exactly opposite positions from the earth, and it will be exactly fifteen on that day.

The fifteenth day of the first lunar month is a saying in the lunar calendar, and the original lunar calendar is a date set according to the cloudy and sunny days of the month, so the moon on the fifteenth day of the first lunar month is round.

Because the moon was not obscured by the earth at that time, we saw the moon at the fifteenth year, which is exactly when the moon is at its fullest.

Because the Sun, Earth, and Moon were in the same straight line on that day, and the Moon was within the penumbra of the Earth, the Moon we see is exactly round.

Since the speed of the moon's revolution around the earth is uneven, sometimes fast and sometimes slow, the length of the synodic moon can differ from its average by up to 6 hours, and therefore the moon can be delayed until the seventeenth night. Of course, if the new year occurs in the early morning of the first day of the new year, then the hope will occur on the evening of the fifteenth, so there are also years when the hope happens to occur on the night of the Mid-Autumn Festival. ‍‍

As we all know, the lunar calendar is based on the law of the moon's orbit around the earth, so it corresponds to the moon very accurately. But the lunar calendar is a combination of the advantages of the lunar calendar and the solar calendar, which will inevitably have errors, when people put the beginning of the lunar calendar must be "Shuo", "Wang" depends on the movement of the moon, usually, it will appear in the lunar calendar.

Ten. Five, sixteen and two days.

Because that day the whole family gathered together, reunited, looking up at the moon in the sky, always felt so round, that feeling was really great.

This is because the Moon revolves around the Earth in an elliptical orbit, and it takes an average of 29 days, 12 hours, and 44 minutes to go from one full moon base to the next full moon. 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.

From a meteorological point of view, it is because at this time, the dry and cold air flowing 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, and at the same time, the inclination of the sun gradually increases, the sunlight and heat obtained by the ground gradually decreases, the temperature is getting lower day by day, the autumn wind reduces the water vapor, and the air is transparent, so the night sky is like a wash, and the moon is exceptionally bright. From the perspective of astronomy, the strength of the moonlight is as weak as the key, which is not only related to the size of the reflective surface of the moon seen by the earth, but also related to the distance of the moon dust from the earth and the distance of the moon from the sun.

The moon on the fifteenth day of the first lunar month is full of du.

At around 18:30 on the night of the Lantern Festival, the public can find a place with a wide field of vision, waiting for the appearance of the beautiful scenery of "Haoyue in the sky". At this time, the moon has just risen, crystal clear and pleasing to the eye. "When appreciating the round round of pearls and jade 'white jade plate', you can also feel the poetry and romance of 'this moon once shines on the ancients'.

Over time, the full moon gradually rises until it reaches due south in the sky, the "Lonely Moon Wheel in the Bright Sky". "At this moment, the moon is like water, and the moon is shining; This situation and this scene make people feel infinite emotion of 'thousands of miles together'. ”

Astronomical experts say that when the moon and the sun are on opposite sides of the earth, and the ecliptic longitude of the moon and the sun are 180 degrees apart, the moon is the roundest at this time from the earth, which is called the "full moon", also known as "hope". The tenth of the lunar month.

Four, ten. On the fifth, sixteenth, and even the seventeenth, a full moon may occur.

It's a little bit closer, it should be sixteen is the roundest!

When the Moon and the Sun are on opposite sides of the Earth, and the ecliptic longitude of the Moon and the Sun differ by 180 degrees, the Moon is the roundest at this time when viewed from the Earth, which is called the "Full Moon", also known as "Wang". Lunar monthly.

Ten. Four, ten.

On the fifth, sixteenth, and even the seventeenth, a full moon may occur.

Statistics show that in the 100 years of the 21st century, the number of full moons is 1,241, occurring in the lunar calendar.

Ten. Seven, ten.

The sixth, fifteenth, and fourteenth times were 188, 579, 468, and 6, respectively. Among them, there are 38 full moons in the Lantern Festival.

As the 'largest and roundest month of the year', the fullest moment of the Lantern Festival Moon in 2019 appeared at 23:54 on the fifteenth day of the first lunar month. Zhao Zhiheng, an astronomical education expert and director of the Tianjin Astronomical Society, said.

The fifteenth day of the first month is round.

The moon on the fifteenth day of the first lunar month is round, but not necessarily the most round. There is often a popular saying: "The moon of fifteen is sixteen round", and this is actually an astronomical phenomenon.

Under normal circumstances, the new moon should be in the early morning of the first day of the lunar calendar, and the fifteenth night of the lunar calendar is exactly the full moon. When the New Moon appears later, the date of the full moon will be extended to the sixteenth or even the seventeenth, which is why the moon on the fifteenth is not necessarily the first to tremble.

The Lantern Festival is a traditional Chinese folk activity. During the Southern Dynasties, the national capital Jiankang (now Nanjing) had the custom of holding a traditional Lantern Festival, and its pomp and circumstance was the highest in the country. The lantern festival flourished in the Tang Dynasty, flourished in the Song Dynasty, and reached its peak in the Ming Dynasty.

During the period of Emperor Yang of the Sui Dynasty, a lantern festival was held at the end gate of the main gate of Luoyang Palace, the capital of the first lunar month, and the end gate was very bright. Change the beat.

The fifteenth moon is round and round, the lights of thousands of homes celebrate the reunion, and the colorful fireworks celebrate the prosperous world, such as weaving visitors to open their faces.

The fifteenth moon is round and round, every household is happy, drinking wine and admiring the moon people are reunited, the days are sweeter than honey, and this auspicious time is to send wishes, hoping that you are healthy and healthy, and harvest a piece of happiness, and wishful thinking always revolves around you. Mid-Autumn Festival, I wish you a happy family and happiness!

The fifteenth moon was round and round, like a disc hanging from the eaves; The firecrackers on the ground are round and round, and the happiness of the coming year will come early; The doll's face is happy to be round, and she looks forward to growing up early to build a home; Grandparents have round glasses, and they are healthy and healthy for the New Year!

The fifteenth moon was round and round, like a crooked bow of a ship, and a round bread of silver.

The fifteenth moon is round and round, like a mirror that is spotless.

Why is there no case of "seventeen rounds" when "the moon of fifteen is sixteen rounds"?