human
I've heard that the'sunset' phenomenon is a natural phenomenon. Can you tell me more about it?
assistant
Sunsets are caused by the Earth’s atmosphere, which absorbs some of the sunlight and then reflects the rest back towards the ground in the form of a glowing red or orange disc. The amount of light reflected depends on the thickness of the air and its composition, as well as the angle at which the sun is setting. This creates different colors depending on the atmospheric conditions, such as yellows, oranges, reds, and violets. As the sun moves lower in the sky, the colors become more muted until they eventually fade away into darkness.