Sunset Wallpaper

Sunset or sundown, is the daily disappearance of the Sun below the western horizon as a result of Earth's rotation. The time of sunset is defined in astronomy as the moment when the trailing edge of the Sun's disk disappears below the horizon. Near to the horizon, atmospheric refraction causes the ray path of light from the Sun to be distorted to such an extent that geometrically the Sun's disk is already about one diameter below the horizon when sunset is observed.

Amazing Sunset and Sun Pictures HD Wallpapers - Digital Art High Definition !

Fun Facts :
Sunset is distinct from twilight, which has three phases, the first being civil twilight, which begins once the Sun has disappeared below the horizon, and continues until it descends to 6 degrees below the horizon.

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