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The suns movement across the sky
From the Earth, we see the sun rise in the east and set in the west. This motion makes it very easy to forget that the sun does not really move at all. It only seems to move because the Earth is constantly spinning/rotating carrying us in and out of the view of the sun.
The view from the Earth is a like the view out the window of a moving car. Now if you imagine that the car is driving around in a circle, you will pass the same scenery over and over again. We are all passengers of the rotating Earth and it carries us past the sun day after day.
The Earth rotates around the axis, an imaginary line through the center of the planet. The axis connects the North and South Poles like an axle connects the wheels in a car. As the Earth spins on its axis , we are carried in and out of the sunlight that is always shinig on half the planet. The earths axis is tilted at 23.5 degrees.