- Dusk
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"Nightfall" redirects here. For other uses, see Nightfall (disambiguation).For other uses, see Dusk (disambiguation).Not to be confused with sunset.
Dusk is the beginning of darkness in the evening, and occurs after twilight, when the sky generally remains bright and blue. Civil dusk is when the earth has rotated enough that the center of the sun is at 6° below the local horizon. This marks the end of the evening civil twilight, the point where artificial illumination is required to read outside.[1] It can be confused with sunset, which is the point at which the earth has rotated enough, that the sun is no longer visible from the local horizon.
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Dusk in Porto Covo, west coast of Portugal
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São Paulo at dusk, view from Ibirapuera Park
See also
References
- ^ U.S. Naval Observatory Rise, Set, and Twilight Definitions.
Parts of a day Related articles: Blue hour · Golden hour · Terminator · Forenoon · Afternoon · Daytime · Daylight · Midnight sunCategories:- Earth phenomena
- Parts of a day
- Night
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