What is the origin of 'sleep tight'? One of the mysteries of the English language finally explained.
The moon doesn't glow in a very real sense. It reflects the Sun's light. (Or the Earth's light if you're not on Earth and in the right position.) As Quora User says, the moon has a high albedo. So it reflects pretty well.
You can tell that the moon actually does rotate by its phases; the  bright portion of the moon is sunlight reflecting off its surface  and it is daytime on the portion of the moon that is lit by the  Sun.