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.
During an eclipse of the Moon, the Earth is directly between the Sun and the Moon, so very little light makes it to the Moon. When there is a new moon phase, the Moon is between the Sun and the Earth, so we cannot see any of the illuminated part of the Moon. Yes, but it is not a direct source of its light. The Moon, like the Earth, is illuminated by the light of the Sun. The moonlight that we see is simply the part of the sunlight that is reflected by the lunar surface.