When the Earth rotates, do there be four seasons? Why?

The reason for the four seasons is that the orbit of the earth around the sun is an ellipse, and the sun is in a focal position (not like a circle, its focus is more left), so when the earth revolves around the sun, the distance from the sun is different, and the heat it naturally receives is not equal!

There are five belts! Because the sunlight will only shine directly between the Tropic of Cancer, so there is more heat between the two lines, and then the heat decreases to the poles, so with the north and south poles (cold temperate zone), the sun has a direct point, which will change with the revolution of the earth, (from the Tropic of Cancer to the Tropic of Cancer and back, keep repeating) so the five belts also have a certain degree of offset, but not much, can be ignored).

What the brother above said is a bit misunderstood......

The earth's seasons change because of the earth's revolution.

The division of the five zones of the earth is based on the distribution of sunlight and heat on the earth's surface......Angle between yellow and red: 23 degrees 26 minutes.

This causes the direct point of sunlight on the Earth to move between the Tropic of Cancer and the Tropic of Cancer ...... as the Earth rotates

And a round trip is a year.

As a result, the Earth's four seasons alternate once a year, ......

Understand that the earth's four seasons arise because of the earth's revolution!!

This is because the earth has a certain gravitational pull, so it needs to rotate, and at the same time, the four seasons will change in the process of revolution, because with the continuous change of the position of the sun and the earth, this situation will be formed, and then it will also affect the temperature of the earth.

Because the angle of the earth facing the sun is different during the revolution, the temperature will be different, so it will lead to the change of seasons.

It is because the sun is also rotating when the earth is rotating, and the heat transmitted by the sun to the earth is different, so it is easy for the earth to change in the four seasons.

Because the sun is changing when the earth is rotating, the heat transmitted by the sun to the earth changes, and the four seasons are formed.

Because the floor drain sphere rotates and revolves around the sun at the same time, the direct point of the sun changes on the earth's surface.

Around June 22 every year, the earth is located at aphelion, and when the sun shines directly on the Tropic of Capricorn, it is the summer solstice of the northern hemisphere, when the northern hemisphere gets the highest heat, the longest day, and the climate is hot, which belongs to the summer of the northern hemisphere, and the southern hemisphere is in a cold winter; Around September 23, when the sun shines directly on the equator, it is the autumn equinox of the Northern Hemisphere, when the Northern Hemisphere is in autumn and the Southern Hemisphere is in spring. Around December 22, the earth is at perihelion, and when the sun hits the Tropic of Capricorn, it is the winter solstice of the northern hemisphere, when the northern hemisphere gets the least heat, the shortest day, and the climate is cold, which belongs to the winter of the northern hemisphere, and the southern hemisphere is in a hot summer; After the direct sun returns to the north, around March 21, the sun will reach the equator again on the vernal equinox in the northern hemisphere, when the northern hemisphere is in spring and the southern hemisphere is in autumn.

In this way, the Earth orbits the Sun in a one-year cycle, resulting in the change of seasons.

The Earth is like a spinning top, it rotates around its axis of rotation constantly, and each revolution is a day. The rotation creates the phenomenon of day and night, with day on the side facing the sun and night on the side facing the sun. When we in China are here in the daytime, the United States on the other side of the world is exactly at night; The direction of the Earth's rotation is from west to east, so we see the sun, moon and stars rising from the east and gradually descending to the west.

Not only does the Earth rotate, but it also revolves around the Sun. The orbit of the Earth's revolution is elliptical, the semi-major diameter of the orbit is 149,597,870 km, the eccentricity of the orbit is about, one revolution is one year, the average speed of the revolution is 29 79 kilometers per second, the angle of intersection between the orbital plane and the equatorial plane is about 23°27', and there are periodic changes The combination of the Earth's rotation and revolution produces the alternation of day and night, the change of the seasons and the distinction of the five zones (tropical, north-south temperate zone and north-south cold zone) on the earth.

Since the Earth's axis of rotation is obliquely intersected with the plane of its orbit at an inclination of about 66°33, during the year when the Earth revolves around the Sun, sometimes the northern hemisphere of the Earth leans towards the Sun, and sometimes the southern hemisphere leans towards the Sun (left).In short, the direct point of the sun always moves between the Tropic of Cancer, resulting in a change in the length of day and night and the alternation of the seasons.

In astronomy, the four seasons begin with the spring equinox, summer solstice, autumn equinox, and winter solstice, but the seasons divided in this way cannot fully reflect the phenological signs of each season in each place. Therefore, our ancestors divided the year into 24 solar terms, each of which was divided into 3 seasons. The climate is also divided into four seasons by the average temperature of the weather (5 days for each weather).

The average temperature of 10 is winter; 22 o'clock is summer; The average temperature is between October and 22 o'clock in spring and autumn.

Since the earth is an opaque planet, the sun and stars give the earth light, and the side that shines on the sun is day, and the other side is the night. The earth is constantly rotating from west to east around its axis of rotation, and the phenomenon of celestial bodies rising in the east and setting in the west is a reflection of the earth's rotation. One rotation of the earth is equivalent to the week when the sun rises in the east, sets and rises again, and it is also our daily day.

As the Earth rotates, it revolves around the Sun, which rotates from west to east. The orbit of the Earth's revolution is an ellipse that is close to a perfect circle, and the Sun is located in a focal point. The Earth's orbital period is one year, and astronomically it is 365 days, 5 hours, 48 minutes and 46 seconds.

The angle between the Earth's orbit (ecliptic plane) and the Earth's rotation plane (equatorial plane) is 23 degrees 26 minutes, which causes the direct point of the Sun to move between the Tropic of Cancer in a one-year cycle, forming the four seasons in temperate regions.

On March 21 every year, the direct sun point moves from south to north to the equator, and the global day and night are equinox, which is our vernal equinox day, and on June 22, the direct sun point moves north to the Tropic of Capricorn, becoming the longest day in the northern hemisphere, which is what we call the summer solstice, and then the direct sun point turns to move south, and on September 23, it hits the equator directly, which is the autumnal equinox, and on December 22, it moves to the Tropic of Capricorn, and it is our winter solstice.

The change of seasons is actually the result of the combined effect of the earth's rotation inclination and revolution around the sun, without one of these conditions, the change of seasons will not occur, and everything on the earth will change accordingly.