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In fact, the angle between the axis of the earth and the ecliptic plane is about 23.5 degrees. If you look in the next animated image, you can see that while earth moves in an orbit around the sun in the ecliptic plane, it rotates around its own axis under that angle of 23.5 degrees all the while.
But Earth's axis tilt doesn't change either. What does change is Earth's orientation relative to the Sun. While Earth spins on its axis, it is also traveling around the Sun in orbital revolution. One full orbit around the sun is about 365 Earth days, or one year.ecause of Earth's spherical shape and axis tilt, incoming radiation is not absorbed evenly across the planet, and this distribution changes with the seasons. Earth's rotation is the cause for the differences in daytime and nighttime as it spins on its axis.