What celestial phenomena are signs of the vernal equinox? What are the astronomical phenomena of the

The four seasons on Earth manifest first and foremost as an astronomical phenomenon, not only periodic changes in temperature, but also in the length of day and night and the height of the sun. Of course, the length of day and night and the change in the height of the sun at noon determine the change in temperature. The gradual change of the seasons is not uniform across the globe, with summer in the northern hemisphere and winter in the southern hemisphere; The Northern Hemisphere changes from warm to cold, and the Southern Hemisphere changes from cold to hot.

Now let's analyze the length of day and night and the height of the sun, which change periodically in different seasons.

From the spring equinox through the summer solstice to the autumn equinox, the northern hemisphere is in the summer half and the southern hemisphere is in the winter half. During this period, the days are longer and the nights are shorter in the Northern Hemisphere, and the days are shorter and the nights are longer in the Southern Hemisphere; The North Pole is in the polar day, and the South Pole is in the polar night; The height of the Sun north of the Tropic of Cancer is always greater than the mean and south of the Tropic of Cancer is less than the average. North of the Tropic of Capricorn, the sun rises over the horizon circle in the northeast and sets on the horizon circle in the northwest.

On the equinox, the sun rises due east and sets due west all over the world.

From the autumnal equinox through the winter solstice to the spring equinox, the northern hemisphere is in the winter half of the year, and the southern hemisphere is in the summer half. During this period, the length of day and night, polar day and night, and solar altitude in the northern and southern hemispheres were reversed. North of the Tropic of Capricorn, the sun rises over the horizon circle in the southeast and sets on the horizon circle in the southwest.

The division of the four seasons.

The seasons are divided according to the length of day and night and the change in the height of the sun. In the division of the seasons, the apparent position of the sun on the ecliptic is used as the basis, and the equinox, solstice, or four days are used as the boundary. However, the boundaries used by Eastern and Western countries to divide the seasons are not identical.

Every year around March 20 of the Gregorian calendar, the sun is at 0° of yellow longitude (the vernal equinox), which is the vernal equinox. On this day, the sun shines almost directly at the Earth's equator, and the day and night are almost equal in length around the world (not taking into account the refraction of sunlight in the atmosphere and the shadow of morning and dusk). After the vernal equinox, the direct point of the sun continues to move from the equator to the northern hemisphere, and the days and nights begin to be longer and shorter in various parts of the northern hemisphere, that is, the days are longer than the nights in a day. Throughout the Southern Hemisphere, the days began to be shorter and the nights longer, i.e., the days were shorter than the nights during the day.

Therefore, the vernal equinox is also called the ascending equinox.

The third is that when you have to wear long sleeves in the early morning in winter, the weather is slightly cool, and the leaves are budding, which proves that spring is coming, which is a sign of the spring equinox.

What weather is a sign of a spring breeze? First of all, there must be the arrival of the spring breeze, and secondly, there must be the arrival of butterflies and bees.

What celestial phenomenon is the growth of the spring equinox, I think it is all spring flowers, it should be.

In fact, the vernal equinox is not a sign of celestial phenomena, that is, the date has arrived.

This is the well salt summarized by the ancient Chinese.

It's related to the weather.

At the same time, it can guide agricultural production.

It is also an indication of changes in the weather.

The time of the spring equinox is the time of the 24 solar terms, and it will be the spring equinox when the spring begins.

The vernal equinox is one of the 24 solar terms and the fourth solar term of spring. Douzhiren, the yellow longitude of the sun reaches 0°, and it is intersected on March 19-22 of the Gregorian calendar every year. The following is what astronomical phenomena of the vernal equinox I have compiled for you, and you are welcome to share it.

In terms of time period, it refers to the position of the Sun between 0° and 15° degrees of ecliptic longitude, which is approximately between March 19 and April 5. But in practice it usually refers specifically to the day when the Sun is actually at 0° of the ecliptic longitude: March 19 and March 22.

Phenomena on Earth

At the vernal equinox, the direct point of the sun is on the equator, and then the direct point of the sun continues to move northward, so the vernal equinox is also called the ascending equinox.

At the vernal equinox, the global day and night are theoretically of equal length (see Morning and Dusk Shadows). After the vernal equinox, the days get longer and the nights get shorter in the Northern Hemisphere, and the nights get longer and the days shorter in the Southern Hemisphere.

At the time of the vernal equinox, there is no extreme day and night phenomenon around the world. After the vernal equinox, the polar day begins to increase near the North Pole. The polar day near the South Pole ends, and the polar night begins to widen.

Daylight at the vernal equinox, when the time of day and night is the same.

Phenological phenomena

Xuanniao to Xuanniao, Yan Ye, Gao Lu said: "The spring equinox comes, and the autumn equinox goes." ”

Thunder is the sound of yin and yang are thin for thunder, so far, the four yang are gradually flourishing, there is still yin, then the thin is the sound; Yes, "Yunhui" said: "It is difficult to get out of the elephant." The note said: "Hair, still out." ”

Electricity, sunlight also; The four yangs are flourishing, and the value is exhausted and the light is born. Therefore, the "Interpretation of the Calendar" says: "Where the sound is, the yang is also; Light, also yang.

Yi said: "Thunder and lightning are combined. "The Legend of the Ram" said:

Electric, Thunderlight. Yes, Xu said: "Lei Yang, electric yin."

Definitely. When there is no thunder in the middle of summer, there is also electricity, which can be seen.

P.S. How does the vernal equinox prevent disease?

The vernal equinox is the period of the four seasons of the year when yin and yang are balanced, day and night are equal, and cold and temperature are half and half"In the spring equinox, yin and yang are half of each other, so the day and night are even, and the cold and heat are flat. "So our country has had it since ancient times"The spring equinox wind is not small, and it is necessary to prevent pain and deep disturbance"said.

Easy five more morning diarrhea.

First, the vernal equinox should have been a period of balance between yin and yang, but the body of yang deficiency, yang weakness can not be balanced with yin, so the essence of yang deficiency is easier to be revealed, so it often occurs five more diarrhea, also known as chicken diarrhea, characterized by food diarrhea, that is, diarrhea that does not dissolve the valley.

Second, the tongue is white, the pulse is heavy and weak, afraid of cold, and those who are cold below the waist can eat Aconite Lizhong Pill or Jinkui Kidney Qi Pill to warm the Yang. Usually you can often use dry ginger stew soup or eat dry ginger stewed chicken soup.

Prone to abdominal pain and diarrhea.

First, due to the strong wind in spring, traditional Chinese medicine believes that those who have spleen and soil, and those with spleen deficiency and white tongue coating are more likely to have abdominal pain and diarrhea, which is characterized by obvious abdominal pain.

Second, the way to maintain health is to take Lizhong pills under the guidance of a doctor on windy days, and to be less exposed to wind outdoors.

Third, around the vernal equinox, it is necessary to prevent cold.

Fourth, use more dried ginger for cooking, because dried ginger can be warm.

Prone to colds and runny nose.

During the spring equinox, there is a lot of wind and strong wind, and it is easy to catch a cold and runny nose, so it is necessary to exercise outdoors to enhance immunity.