afterglow
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thumb|Afterglow with its bright segment and purple light above, interrupted by crepuscular rays
Wikidata facts
- Instance of
- natural phenomenon
- Subclass of
- atmospheric optical phenomenon
- Part of
- dusk
- Follows
- sunset
- Image
- Dadaocheng Wharf 02.jpg
Show 5 more facts
- opposite of
- red sky at morning
- different from
- alpenglow
- Commons category
- Afterglow
- has cause
- Sun
- described by source
- Encyclopædia Britannica 11th edition
Sources (3)
via Wikidata · CC0
~4 min read
Encyclopedic overview
5 sectionsContents
- History
- Gallery
- See also
- References
- External links
thumb|Afterglow with its bright segment and purple light above, interrupted by crepuscular rays
In meteorology, an afterglow is an optical phenomenon, generally referring to a broad arch of whitish or pinkish sunlight in the twilight sky after sunset, consisting of purple light and bright segment. It consists of several atmospheric optical phenomena. The purple light mainly occurs when the Sun is 2–6° below the horizon, during civil twilight (from sunset to civil dusk), while the bright segment lasts until the end of the nautical twilight. Similarly, a foreglow is a broad arch of whitish or pinkish sunlight in the twilight sky before sunrise, consisting of purple light and bright segment.
Excerpted from Wikipedia’s “afterglow” article, available under the CC BY-SA 4.0 licence.