What is the definition of a sunset?
Quick Answer: A sunset is the moment when the upper edge of the sun disappears below the horizon in the evening. It marks the end of the day as daylight fades and night begins.
The sun appears to move across the sky due to Earth's rotation. When it sinks below the horizon, the sky changes color and light dims. This visual event is what we call a sunset.
Sunsets vary in exact time depending on your location and the time of year. The atmosphere also scatters sunlight, creating those beautiful reds, oranges, and pinks we often see at sunset.