**Setting Sun**
**Definition**
The setting sun refers to the daily disappearance of the sun below the western horizon as the Earth rotates, marking the transition from day to night.
**Overview**
The setting sun is a natural phenomenon observed worldwide, occurring when the sun moves out of the observer’s line of sight due to Earth’s rotation. This event signifies the end of daylight and the beginning of twilight, which includes phases such as civil, nautical, and astronomical twilight. The colors seen during sunset result from the scattering of sunlight by the atmosphere, often producing vivid reds, oranges, and pinks. The setting sun has cultural, scientific, and navigational significance, influencing art, literature, and timekeeping throughout history.
**META_DESCRIPTION**
The setting sun is the daily event when the sun disappears below the horizon, marking the transition from day to night and producing characteristic twilight colors.