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.
New Moon-The Moon's unilluminated side is facing the Earth. Waxing Crescent-The Moon appears to be partly but less than one-half illuminated by direct sunlight. First Quarter-One-half of the Moon appears to be illuminated by direct sunlight.