How to distinguish between spring, summer, autumn and winter in the schematic diagram of earth orbit? Be detailed and careful, thank you! !
Because of the ecliptic angle, the rotation axis of the earth is inclined to the orbital plane of the earth during its revolution around the sun. Since the earth axis is perpendicular to the equatorial plane of the celestial sphere, the intersection angle between the earth axis and the earth orbital plane should be 90-23 26', that is, 66 34'. No matter where the earth rotates, this tilt remains the same. Therefore, we can judge summer and winter from the hemisphere position where the sun shines directly on the earth:
The hemisphere with direct sunlight is summer, and the other hemisphere with direct sunlight is winter. In the middle is spring or autumn. Distinguish which is spring and which is autumn, mainly depends on the direction of the earth's revolution, winter to spring, summer to Qiu Lai.
Extended data
The revolution of the earth is characterized by:
1. Due to the influence of the yellow-red intersection angle, direct sunlight moves back and forth between the Tropic of Cancer and the Tropic of Cancer every year. There are two direct sunlight between the Tropic of Cancer, one on the Tropic of Cancer, and no direct sunlight in the areas north of the Tropic of Cancer and south of the Tropic of Cancer.
2. Depending on the sun from the vernal equinox to the summer solstice to the autumnal equinox, the speed of the earth's revolution is slow, and it takes more than 186 days, which is more than half of the whole year. This is the summer half year in the northern hemisphere and the winter half year in the southern hemisphere.
3. With the sun passing through the winter solstice from the autumnal equinox to the vernal equinox, the revolution speed of the earth is relatively fast, which takes 179 days, less than half of the whole year. This is the winter half year in the northern hemisphere and the summer half year in the southern hemisphere. It can be seen that the change of the revolution speed of the earth is the fundamental reason for the unequal length of the four seasons on the earth.
The earth is in the process of revolution, and every point on the route it passes is on the same plane and forms a closed curve.
The center of the earth's revolution is not the center of the sun, but the common centroid of the earth and the sun. Not only the earth is rotating around this common center of mass, but also the sun is rotating around this point.
Baidu Encyclopedia-The Revolution of the Earth