Every Mid Autumn Festival, the moon is usually big and round, especially bright, and has become the protagonist looked up to. So do you know why the moon is so bright to the Mid Autumn Festival? Here's what I sorted out. Why is it particularly bright from the month to the Mid Autumn Festival_ The customs and health knowledge of the Mid Autumn Festival are welcome to read, share and learn from.
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Why is it so bright from the moon to the Mid Autumn Festival
From a meteorological point of view
1. High visibility
At this time, the dry cold air from the north,
Force the warm and humid air to retreat south.
As a result, the clouds in the sky gradually decreased
High visibility,
The moon will also appear particularly bright.
2. Receive more light
The Mid Autumn Festival is around the autumnal equinox
The inclination of the sun also increases gradually
The days are almost as long as the nights
The moon is due east
It just receives direct sunlight in the due west direction
Receives the most sunlight
Therefore, it is extraordinarily bright.
From an astronomical point of view
1. Large reflective surface
The moon itself is not luminous and opaque,
Its light comes from the reflection of sunlight,
And only the part of the moon that is directly illuminated by the sun can be reflected.
We can only see the different images of the moon illuminated by sunlight from different angles
This constitutes the round and short change of the moon, that is, the phase of the moon.
For observers on earth, every phase of the moon is a different kind of beauty,
In order to distinguish the phases of the moon, we give different phases nice names:
New moon, upper eyebrow moon, upper chord moon, upper convex moon, full moon, lower convex moon, lower chord moon and waning moon.
Therefore, from the perspective of the earth, the strength of the moonlight should be related to the size of the reflective surface of the moon,
When the moon's reflective surface is at its maximum, it is full circle,
Therefore, the moon is usually the brightest at the full moon.
2. Close distance between earth and moon
The moon's orbit around the earth is oval,
In the process of operation, it is far and near from the earth,
When the moon moves to the near earth point of its elliptical orbit,
Due to the shortening of distance,
The surface of the moon will "look" larger than in other positions,
In fact, it is the truth that the distance is big and the distance is small.
Around the Mid Autumn Festival, the moon just moves to the celestial equator in the night sky,
Above the equator of the earth,
At this time, the moon is closest to the earth,
The light reflected to the ground is also the most.
Therefore, the moon in the mid autumn night sky looks the brightest and brightest.
What are the health knowledge of Mid Autumn Festival
1. Physical training: drink plenty of water, go to bed early and get up early
The climate in autumn is dry, it is easy to feel dry mouth and tongue, and the skin moisture is also easy to lose. Therefore, we should pay special attention to the supplement of water, drink more water, eat more fruits containing colloid and water, and avoid too intense exercise. And should go to bed early and get up early, which can reduce the probability of thrombosis and prevent cardiovascular disease.
2. Prevent autumn colds: avoid excessive evaporation of food
At the beginning of autumn, the summer heat drops from prosperity to coldness and heat at night. The temperature difference between day and night changes greatly. Around October, the summer heat gradually subsides. However, when the tiger is powerful in autumn, the weather is stuffy and hot. This cold and hot weather is the most likely to catch a cold.
3. Please cultivate optimism
Jing wants to reap the joy of fruitful achievements, or judge the coolness of spring and autumn in the alternation of natural seasons from the perspective of philosophers, maintain inner peace, collect spirit and gather Qi, and prepare for the potential accumulation of Yang Qi.
4. Feeding
The climate in autumn is slightly cool, and there is a general lack of moisture in the air. The food should be dry and absorb Yin to nourish the kidney and lungs. In the diet, a small amount of spicy and loose food such as pepper, onion, leek and garlic, together with soft food such as sesame, glutinous rice, honey, sugarcane, spinach, white fungus, pear, duck and dairy products. As for the elderly, you can also eat more rice porridge to benefit your stomach and generate fluid.
The custom of Mid Autumn Festival
1. Moon cakes are indispensable during the Mid Autumn Festival. They symbolize reunion and perfection. They are our sustenance for family affection. On the occasion of the Mid Autumn Festival, relatives and friends give moon cakes to each other, which is not only the embodiment of family affection, but also the connection of social relations.
On the night of the festival, the family will cut moon cakes around the incense table and eat them. Everyone should eat them, which means that they are part of the family and symbolize the members of the league.
2. The Mid Autumn Festival is also a festival for offering sacrifices to the moon. People will set up incense tables, light incense, put fruits, moon cakes, etc. the incense tables are placed in the courtyard to express the worship of the moon and people's respect for God.
3. Enjoy the moon. The moon is beautiful on this day. It was initiated by ancient literati and poets. Their poems and works promote this activity to gradually become a custom. On this day, a family can enjoy the moon together, which is called consummation. If a person wanders outside to enjoy the moon, he will be very lonely. Anyway, on this day, we can't help looking at the moon.