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
