The seasons of the year happen because of the inclination of the earth in relation to the sun. The movement of our planet around the sun takes one year. This movement is called translation and its main consequence is the change of seasons. If the Earth did not tilt on its axis, there would be no seasons.
In fact, the Earth's axis of rotation is inclined at an angle of 23 degrees and 26 minutes to the perpendicular line to the eclipse plane.
Seasons are caused by the tilt of the Earth's axis of rotation relative to the perpendicular to the plane defined by the Earth's orbit (the plane of the ecliptic). This tilt causes the Earth's orientation relative to the Sun to continually change as the Earth revolves around the Sun.
With this information, we can conclude that Earth's axial tilt (also known as the obliquity of the ecliptic) is about 23.5 degrees. Due to this axial tilt, the sun shines on different latitudes at different angles throughout the year. This causes the seasons.
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