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.
The moon is always gray. The different atmospheric conditions just make the light appear different colors. The moon is sometimes orange because of refraction. The moon can appear orange when it is low in the sky and when there are a lot of dust particles in the atmosphere. The visible light of the moon is made up of different colors: red, orange, yellow, blue, green and purple (which together appear white).