The sun doesn't "set" in the Earth. It's the Earth's rotation that *makes it appear* as if the sun is setting in the west. Here's why:

* Earth's Rotation: The Earth spins on its axis, completing one rotation every 24 hours. This rotation is what causes day and night.

* Perspective: As the Earth spins, the side facing the sun experiences daylight. As the Earth continues rotating, the side facing the sun gradually moves away from the sun. This creates the illusion of the sun moving across the sky, eventually "setting" in the west.

* The Sun's Position: The sun doesn't actually move; it's our perspective from Earth that changes. The sun remains in its position, but as the Earth turns, we see it in different parts of the sky.

So, to be precise, the sun doesn't set in the Earth or west. It's the Earth's rotation that causes the apparent sunset in the west.