Is the heat or cold of the weather determined by the sun?

Of course not, it is the air that determines the cold and heat.

The cold and heat of the weather are only related to the movement of the sun, and the movement of the sun and the moon will still have a great impact on the weather, which is a relatively deep-seated geographical problem.

Bright. One yin and one yang: the sun is the sun, representing yang, and the moon is the moon, representing yin.

One short and one long: the day character and the month character, after being combined into a Ming character, the month font is longer, and the day font is shorter.

Day and night: Day is day, the sun rises, that is, day, night is night, and the moon rises in clear sleep, that is, the month.

One hot and one cool: because of the large temperature difference between day and night, the temperature is high during the day and low at night.

Ming, a commonly used word in Chinese, was first seen in oracle bone inscriptions, and its original meaning is bright and clear, and later extended to understand and understand.

The surface temperature is about 5500, and the core temperature is about 1500 0000.

The sun is experiencing violent nuclei all the time.

In the cold winter, people always have to have a stove or heating when they enter the house. Moreover, everyone knows that the closer you are to the stove or heater, the higher the temperature; The farther away from the stove or heater, the lower the temperature.

The distance of the Earth from the Sun is constantly changing as it rotates. Every year, January 3 is the closest day between the Sun and the Earth, and July 4 is the farthest day between the Sun and the Earth. It stands to reason that it should be hot in January and cold in July, but the reality is the opposite.

In fact, the earth is so far away from the sun that the average distance between the two is 100 million kilometers, and the difference between the farthest and closest between the sun and the earth is only 5 million kilometers. This distance has little effect on the Earth's access to solar heat.

Because the Earth's axis of rotation is not perpendicular to the orbital plane, the angle between the same observation point and the Sun will change when the rotation and revolution occur at the same time.

For example, in the summer in the Northern Hemisphere, the sun hits the Tropic of Capricorn, and in the same place, in the winter in the Northern Hemisphere, the sun hits the Tropic of Capricorn.

Since the direct point of the sun moves between the Tropic of Cancer, so:

1. In the area between the Tropic of Capricorn, there are two opportunities for direct sunlight a year, and the height of the sun at noon is the maximum, at 90°. A minimum occurs when the Sun shines directly on the Tropic of Capricorn. Except for the two minima, which are the lowest at the equator, the other regions are the smallest when the sun directly hits the Tropic of Cancer in the other hemisphere.

2. In areas above the Tropic of Capricorn, there is a chance for direct sunlight once a year, which are the summer solstice and the winter solstice.

3. In areas outside the Tropic of Cancer, the Tropic of Cancer can be included, which is the largest when the sun directly hits the Tropic of Cancer in the home hemisphere, and the smallest when it directly hits the Tropic of Cancer in the other hemisphere.

For example, Beijing is about 40 degrees north latitude, and during the summer solstice in the northern hemisphere, the sun shines directly on the Tropic of Capricorn, and the noon sun height here is the largest, about; On the winter solstice, the sun shines directly on the Tropic of Capricorn, and the height of the midday sun here is the smallest, about.

Because of the rotation of the earth, the direct point of the sun on the earth reciprocates between the Tropic of Cancer once a year. Take the area through the Tropic of Cancer in the Northern Hemisphere as an example: when the sunlight directly hits the Tropic of Cancer in a year, it is the summer solstice solar term in northern China, and the sun is directly above the head at noon, that is, the solar altitude angle is 90°, which is the maximum value of the year; When the sunlight hits the Tropic of Capricorn directly, it is the winter solstice solar term in the north of China, and the solar altitude angle at this time is 43°, which is the minimum value of the year.

Due to the rotation of the Earth, the apparent motion of the Sun (rising in the east and setting in the west) is produced, that is, the diurnal variation of the height of the Sun.

Due to the rotation of the earth, the direct point of the sun moves north and south, resulting in the phenomenon of latitudinal changes and seasonal changes in the height of the sun at noon.

Perihelion (early January) The earth is close to the sun, and the earth receives more solar radiation from the sun, but at this time, the sun shines directly in the southern hemisphere, and the southern hemisphere receives more solar radiation than the northern hemisphere, so the southern hemisphere is the summer half of the year, and the northern hemisphere is the winter half of the year, and the temperature is lower. The aphelion point (early July) when the earth is far away from the sun, the earth receives less solar radiation from the sun, but at this time, the sun shines directly in the northern hemisphere, and the northern hemisphere receives more solar radiation than the southern hemisphere, so the northern hemisphere is summer half of the year, and the temperature is higher.

The Earth orbits in an elliptical orbit around the Sun, which is the focal point of the ellipse, and the Earth is closest to the Sun by 100 million kilometers. At the beginning of January each year, the Earth travels to its closest position to the Sun, the perihelion. At the beginning of July each year, the Earth orbits to the farthest point from the Sun, the aphelion.

Some people think that it should be hot near the sun, but in fact, the seasons are determined by the tilt of the earth, not by the distance between the sun and the earth.