👉 "Starlit" is a term used in astronomy to describe an area of light that appears to be shining through a dark background. This phenomenon occurs when the Earth's atmosphere is composed primarily of nitrogen and oxygen, which emits ultraviolet radiation at wavelengths longer than visible light, such as blue and red. When this light is scattered by the Earth's surface, it reflects off of objects in the sky, creating an area of light that appears to be "lit up" or "starlit."