Sunset also known as sundown,is the daily disappearance of the sun below the horizon due to Earth's rotation.As viewed from the equator,the equinox sunsets exactly due west in both Spring and Autum.
As viewed from the middle latitudes,the local summer sunsets to the northeast for the Northern Hemisphere but to the southwest for the southern hemisphere..The time of sunset defined in astronomy as the moment when the upper limb of the sun disappears below the horizon.
Near the horizon,atmospheric refraction causes sunlight rays to be disorted to such an extent the geometrically the solar disk is already about one diameter below the horizon when a sunset is observed.
Sunset is distinct from twilight, which is divided into three stages,the first being civil twilight,which begins once the sun has disappeared below the horizon,and continues until desends to 6 degrees below the horizon;the second phase is nautical twilight, between 6 and 12 degrees below the horizon;and the third is astronomical twilight, which is the period when the sun is between 12 and 18 degrees below the horizon.
And the sunset it creates a natural scene which is very much beautiful and it’s called twilight.
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