In the four seasons of spring, summer, autumn and winter, why is the summer solstice the longest day

Because on the day of the summer solstice, the angle at which the earth rotates is exactly the angle that is illuminated by the sun for the longest time, so the day is the longest. The winter solstice is the other way around, the sun shines for the shortest time, so the winter solstice has the shortest day.

Because on the summer solstice, the earth is closest to the sun, and the earth receives the longest amount of light, so the summer solstice has the longest day.

When the sun shines directly on the Tropic of Capricorn, the Northern Hemisphere receives more solar heat, and the days are longer than the nights, so the temperature in the Northern Hemisphere is at the highest time of the year, which is summer; At this time, the sun is obliquely shining in the Southern Hemisphere, which receives less solar heat and has longer nights than days, so the Southern Hemisphere is in the coldest season of the year - winter. As a result, the days are the longest in summer and the shortest in winter.

The summer solstice is the longest day of the day. On the summer solstice, the sun shines directly on the Tropic of Capricorn, and the daylight hours are the longest in the northern hemisphere. For the Tropic of Cancer and the regions north of it, the summer solstice is also the day of the year when the sun is at its highest at noon.

As soon as the summer solstice arrives, heavy rains frequently occur in the middle and lower reaches of the Yangtze River and the Jianghuai River basin, which are prone to flood disasters and even pose a threat to people's lives and property. After the summer solstice, the temperature gradually rises, and the diet should be aimed at clearing the heat and increasing appetite, so it is necessary to eat more bitter food, which should be clear and supplemented, not too salty and too sweet.

The length of daylight hours on the summer solstice varies from region to region, with the farther north you go, the longer the daylight hours in the northern hemisphere; "Manuscript of Compliance with the Constitution": "The day is northern, the day is long, and the shadow is short, so it is called the summer solstice." The most solitary, the extreme.

On the day of the summer solstice, the sun reaches the northernmost point of the year, almost reaching the Tropic of Cancer (23°27'N), and the days in the Northern Hemisphere reach the longest and get longer the further north you go.

On the day of the summer solstice, in Shantou, Guangdong, the day is 13 hours and 30 minutes; In Nanjing, the daytime is 14 hours and 12 minutes; In Beijing, the daylight is 15 hours, while in Aihui, Heilongjiang Province in northeastern China, the daytime is as long as 16 hours and 18 minutes. When it comes to the winter solstice, it is 10 hours and 36 minutes during the day in Shantou, 10 hours in Nanjing, 9 hours and 16 minutes in Beijing, and only 8 hours in Aihui.

The above daylight hours are calculated based on the total time from the sun rising above the horizon to sinking into the horizon. However, due to the scattering of sunlight by the atmosphere, there is dawn before sunrise and twilight after sunset, which can make the daylight longer.

No, it's the opposite for the Southern Hemisphere, with the shortest day of the day.

Of the 365 days in a year, the summer solstice (June 22) is the longest daylight and the winter solstice (December 22) is the shortest.

On the day of the summer solstice, the sun reaches the northernmost point of the year, almost reaching the Tropic of Cancer (23°26 28 44 north latitude), and the days in the Northern Hemisphere reach the longest and longer the further north you go. It is the longest day of the year in the northern half of the blind base ball, and it is about 14 hours from sunrise to sunset in most parts of the south.

The winter solstice is the shortest day and longest night in the Northern Hemisphere. The ancients Mingzhou said that the winter solstice is: the solstice of the cathode, the beginning of the yang energy, the solstice of the south of the day, the solstice of the short day, and the solstice of the long shadow of the sun, so it is called the "winter solstice".

After the winter solstice, the climate in various places has entered the coldest stage, that is, people often say "into the nine", our people have "cold in Sanjiu, hot in Sanfu" saying.

Spring and autumn equinoxes: The sun shines directly on the equator in the morning, and the elevation angle of the sun gradually decreases from the equator to the north and south poles at noon. Summer Solstice:

The solar elevation angle at noon decreases from the Tropic of Cancer to the north and south poles. Winter solstice: The solar elevation angle at noon gradually decreases from the Tropic of Cancer to the north and south poles.

Spring equinox - 3 21, summer solstice - 6 21, autumn equinox - dust open 9 22, winter solstice - 12 21.

From the winter solstice, the days get longer and longer, but from the spring equinox the days are longer than the night, from the day of the summer solstice, but from the autumnal equinox the days are shorter than the night.

The reason is that the winter solstice is when the sun shines directly on the Tropic of Capricorn, and the day is the shortest in the northern hemisphere, and then the direct point moves north, and the daytime socks are getting longer and longer. After the vernal equinox, the direct point of the sun moves to the Northern Hemisphere, and then the days are longer than the night!

Because on the winter solstice, the sun shines almost straight on the Tropic of Capricorn, which is the shortest day of the year in the Northern Hemisphere.

In winter, for the Northern Hemisphere, the winter solstice is the shortest day of the year, while for the Southern Hemisphere, the summer solstice is the shortest day of the year, which has a certain connection with the Earth's revolution.

Since the Earth is located near perihelion around the winter solstice and travels at a slightly faster speed, this results in a year when the sun shines directly on the southern hemisphere about 8 days shorter than when it hits the northern hemisphere, so the winter in the northern hemisphere is slightly shorter than the summer.