You’ve probably noticed that when you go to sleep at night, the sun appears to no longer be in the sky! Where has it gone? Is it off to bed, just like you?
The reason you don’t see the sun at night is because the Earth is constantly rotating, or turning around in circles. When the place where you are on Earth is facing the sun, you have daytime. Throughout the day, the Earth gradually turns on its axis. Eventually, that same place where you are on Earth is no longer facing the sun, and so you have nighttime!
Do you think that sounds cool? Here’s something even cooler! – When the Earth has turned around so that it’s nighttime where you live, that means it’s now daytime in another part of the world, where they are now facing the sun! So at night when you no longer see the sun in the sky, it’s just because your part of Earth has turned away from its light. The sun hasn’t gone to bed; instead, it’s giving daytime to people in other parts of the world.