Earth's Four Seasons

The formation of the four seasons results in an angle of 66 ° 34 ′ between the plane of the Earth's orbit and the Earth's axis, causing the northern and southern hemispheres to tilt towards the Sun during the Earth's orbit, resulting in changes in the amount of received light. So, the phenomenon of seasonal changes appeared on Earth.

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There is an angle between the Earth's orbit around the Sun and its axis of rotation. When the Earth is at different positions on its orbit, there will be differences in the angle of sunlight on Earth. This difference reaches its maximum around June 22 and December 22, and is basically in the middle around March 21 and September 23. The Earth's rotation axis has a tilt angle of 23.5 degrees. When the northern hemisphere receives direct sunlight and is in the midst of summer, the southern hemisphere faces the slanting sunlight and is in the midst of winter. Spring in the northern hemisphere corresponds to autumn in the southern hemisphere, and both hemispheres receive the same amount of sunshine. This is the origin of the four seasons.