The cold dew is early, the winter solstice is late, and it's a good time to plant wheat in the fall.
Moderate planting wheat yearly harvest, too early too late there are flashbacks,
First plant the silt and then plant the sand, seven days out of the bud just right.
Late fall crops again management, with ripe with the harvest can not be late.
Cotton lint into the center spray flowers, four to six days a pickup,
Mid-spray lint is cost-effective, and the single retention of seed is just right.
Broccoli and green onions should be planted, cabbage watering and fertilizer,
Winter warm plastic greenhouse membrane cover good, planting cucumbers and tomatoes.
The green storage of straw is again engaged in, livestock mating opportunity do not lose.
The fish bait can not be reduced, the lotus root picking push sale.
Chinese 24 Seasons·Cold Dew
Cold Dew
Cold Dew, is the twenty-four seasons in the 13th festival, the Big Dipper handle to the northwest, the sunlight arrives at the yellow longitude 135°, in each year the solar calendar August 7— 9 cross section. Cold dew is the first festival of autumn, for the beginning of autumn. Autumn from the cold dew until the end of the frost, its start and finish, is the result of the operation of the stars.
Seasons
So, how can there be alternating seasons of transformation on Earth? And what does rotation on Earth have to do with the seasons? Follow me to find out!
|Relationship between the seasons and the Earth|
01
Earth is one of the eight planets of the solar system planets, according to the order of the sunlight from near to far ranked as the third, but also the solar system planets in the diameter, mass and density of the Earth-like planets, distance from the sunlight 1.5 billion kilometers.
The Earth rotates at a constant speed from east to west, in addition to rotating closely around the Sun. Currently 4 to 4.6 billion years old, it has a purely natural communication satellite — — the surface of the moon, the two constitute a celestial system — — Earth-Moon system. 4.6 billion light-years ago began with the initial sunlight nebula.
The Earth's core has a nucleus, mantle and shell structure, and the outside world on the Earth has the hydrosphere, the atmosphere and its magnetic field.
02
The Earth has been constantly rotating at a constant speed from east to west, and additionally constantly revolving around the sun. The path of the Earth's revolution is an elliptical shape, and the sun's rays are situated on a focal point from the beginning to the end.
The Earth's axis maintains an angle of 66°34′ with the rotation path throughout the Earth's continuous rotation, i.e., the Earth is rotating diagonally around the Sun from the beginning to the end.
Due to the rotation of the Earth, this results in a change in the point of direct sunlight in the Earth's atmosphere. As a result, during a year of Earth's revolution around the Sun, sometimes the Northern Hemisphere map tends to be sunlit, and sometimes the Eastern Hemisphere tends to be sunlit.
03
No matter how it rotates, throughout the year, the point of direct sunlight has been moving back and forth between 23°26ˊ north latitude and 23°26ˊ south latitude, which means that the point of sunlight has been moving in the middle of the southern and southern Tropic of Cancer.
Also only in the middle of the South, South-North Tropic of Cancer, you can see the sun directly above the head of the scenery; and in the Earth's equatorial region of the sun always irradiate the road, the poles of the sun is always irradiated on the road.
Therefore, based on the solar altitude and the length of day and night with the transformation of the level of the Earth's atmosphere has mutual characteristics of the territory, according to the level of zoning for the five heat zones, namely, subtropical, south temperate zone, north temperate zone, south frigid zone, north frigid zone.
04
Because the sunlight light source irradiation above the Earth's atmosphere, resulting in a rise in temperature, the unirradiated location is the temperature of the relative nature of the decrease, so the Earth is not the same will not appear the same temperature shift.
China's ancient laborers based on this shift and the regularity of the recovery of all things, summarized the & ldquo; twenty-four seasons & rdquo; (the festival was first summarized by the laborers of our country, in general, a reference to the festival, is the northern hemisphere map of the country belongs to the General refers to all of us.
05
With the spread of the Chinese calendar, the 24 solar terms have been widely spread to many parts of the world. First of all, the four important seasonal points, that is, the sun's point of direct sunlight to the Earth's equator and the South, South and North Tropic of Cancer, that is, we often say that the four seasons of the year in the connecting point of the & ldquo; spring, summer, fall, winter solstice & rdquo;.
Detailed:
It is important to note that perihelion occurs at the beginning of January and aphelion occurs at the beginning of July of each year, and this does not change, but the seasons are reversed for the northern and southern hemispheres. In other words, everyone in the northern hemisphere map in July feel the onset of summer, while the eastern hemisphere because it is directly opposite the northern hemisphere map, direct sunlight sources are not enough, the season is more the onset of winter.
|Earth Rotation and Seasons
Small Summer: Coming around June 22nd of every year, the Earth is situated at the aphelion point. The sun's rays will shine on the Tropic of Cancer, and this day is the summer solstice for the Northern Hemisphere map. In addition, the northern hemisphere map receives the most heat, the most days and the weather is also very hot, attributed to the northern hemisphere map of summer, but the eastern hemisphere is the opposite, in the cold winter.
Autumn: Since then, once again, the Earth is constantly operating on a rotational path, and the sun's rays are shifted to the south. On or about September 23rd of each year, the sun's rays hit the Earth's equator, which is the date of the Autumnal Equinox on the map of the Northern Hemisphere. Now that the Eastern Hemisphere and its Northern Hemisphere map get the same amount of heat from the sun, day and night are equally divided, with the Northern Hemisphere map being fall and the Eastern Hemisphere being spring.
Winter Solstice: After that, the Earth continues to orbit again, and on and around December 22nd of each year, the Earth begins to sit at perihelion, and the sun's rays hit the Tropic of Capricorn. This day is the time of sunlight for the Northern Hemisphere map. At this time, the northern hemisphere map obtains at least heat and the shortest daytime hours, the weather is also very cold, this is the northern hemisphere map of winter. And the Eastern Hemisphere happens to be summer, which is the summer solstice in the Eastern Hemisphere.
Rising Spring: Then, the sun's point of direct sunlight back to the north, in every year on March 21st up and down, the sun's rays once again to the Earth's equator, this day is the northern hemisphere map of the vernal equinox day. At this time the Eastern Hemisphere is indeed the autumn equinox in the fall.
1
The Earth is constantly orbiting around the sunlight like that for a period of one year, which in turn causes the seasons to alternate. Thus, the result of the Earth's revolution around the Sun immediately causes the formation of seasons.
“The division of the twenty-four solar terms ” is a brilliant achievement of China's ancient astronomy and qi research. Over the past thousands of years, it has given full play to the heavy efficacy in the distribution and specific guidance of agricultural and animal husbandry processing, which is also in our country's laborers clever crystallization.
1
|Autumn Equinox Poetry|
"Autumn Equinox Day Memories with Ji"
(Qing Dynasty) Zi Jing Yi
When I meet the festival, I think of my son, and compose a poem about the sunset.
The swallow will go tomorrow, and the fall will come at this time.
It is better to hang up the sails early than to wait for the snow to compete.
Sweeping the QR code to watch the little book children's museum of heaven and earth
