Borgerligt tusmørke

Om morgenen er der borgerligt tusmørke i tidsrummet fra solens centrum er 6 grader under horisonten til solopgang. Om aften er der borgerligt tusmørke ved solnedgang til solens centrum er 6 grader under horisonten.

Ved borgerligt tusmørke ses kun de klareste stjerner, og både horisonten og andre objekter ses tydeligt, så der er ofte ikke behov for at tænde ekstra lys.

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