Twilight

(Last edited: Friday, 28 April 2023, 6:09 PM)


Image/Video/Audio Source:

Short definition:
Twilight is the phase (period) just after sunset, when astronomical night has not yet occurred.

Detailed Definition:
Twilight is the period after sunset when the Earth is illuminated by sunlight diffused in the atmosphere. The following twilight phases are distinguished: civil twilight, nautical twilight and astronomical twilight. The only difference between twilight phases is where the Sun is located, which makes the sky gets darker. When the Sun is up to 6°  below the horizon, it is considered a civil twilight. When the Sun is between 6° and 12° below the horizon, it is said to be a nautical twilight. An astronomical twilight is when the Sun is located from 12° to 18° below the horizon. When Sun position is over 18° below the horizon line, it is considered as night.

Etymology:

late Middle English: from Old English twi- ‘two’ (used in an obscure sense in this compound)
from Latin lūx (“light”), from Proto-Indo-European *lewk- (“white; light; bright”)

Sample Sentence(s):
Twilight heralds the beginning of the night.

Translations:
French:

Le crépuscule

German:
die Dämmerung

Polish:
Zmierzch

Swedish:
Skymning

Spanish:

El crepúsculo

Links to Videos/Articles:
https://www.weather.gov/lmk/twilight-types
https://www.britannica.com/dictionary/twilight
https://www.timeanddate.com/astronomy/different-types-twilight.html
https://youtu.be/FX1slLeJRPg


» Dictionary of Space Concepts