Alminnelig tussmørke

Alminnelig (også kalt sivilt) tussmørke skjer både morgen og kveld (i tillegg har vi nautisk tussmørke og astronomisk tussmørke). Om morgenen begynner det når det geometriske senteret til solen er 6 grader under horisonten, og det varer til soloppgang. Om kvelden begynner det med solnedgangen og slutter når solens geometriske sentrum ligger 6 grader under horisonten. Under alminnelig tussmørke trenger vi normalt ikke kunstig belysning for å kunne se horisonten og jordiske gjenstander.

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