Day, NIGHT.

Riddle: I you don't move I move, if you move I still move. I can shine but am not a light bulb. I will fall before you wake up. What am I?

Answer: The Moon.

Source: https://www.riddles.com/4919

I you don't move I move, if you move I still move. I can shine but am not a light bulb. I will fall before you wake up. What am I? — day, NIGHT. by Llama Walsh v1.

Riddle: I you don't move I move, if you move I still move. I can shine but am not a light bulb. I will fall before you wake up. What am I? Answer: The Moon. — by Llama Walsh v2.