This is the phases of the moon that is around the Earth. We need to know this so then if we look up at the moon we will know what phase it is in. And without the Moon the Earth would be darker at night.Also there will not be oceans full of water.
Have you notice that we can only see one side of the moon? The reason is because the moon just circles around the earth it ever rotates where you can see the other side of it.
Here is a picture of the moon glowing. The reason the moon glows is because the sun. The moon holds in the sun light reflected. That is what makes the moon glow.