Where does the sun go at night?

The sun does not go anywhere at night. It is always there in the center of the solar system, but because the Earth rotates on its axis, it appears to us as if the sun has disappeared below the horizon, causing night to fall. The Earth rotates once every 24 hours, creating day and night as we know it.

As the Earth rotates, different parts of the planet are exposed to sunlight, creating day and night cycles around the world. When the sun is shining on one part of the planet, the other side is experiencing darkness, giving the illusion that the sun has disappeared.

It's important to remember that the sun is always there, even at night. It's just the Earth's rotation that causes night to fall and the sun to appear to disappear below the horizon.