The Different Types of Twilight, Dawn and Dusk - Deepstash

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TIMEANDDATE

The Different Types of Twilight, Dawn and Dusk

The Different Types of Twilight, Dawn and Dusk

timeanddate.com

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TWILIGHT: Half-light

  • from Old English twi- ‘two’ (used in an obscure sense) + light (English) = twilight (late middle English)

-OxfordLanguages

  • literally 'second light, half-light'

--wiktionary

Twilight occurs when Earth's upper atmosphere scat...

Civil Twilight: Practical Twilight

“The length of twilight is an element useful to be known: by prolonging the day, it permits the continuance of labor.”

-French physicist Auguste Bravais

Civil twilight occurs when the sun is less than 6 degrees below the horizon

CIVIL DAWN

In the morning it begins...

This period is less bright than civil twilight.Artificial light is needed for outdoor activities

Nautical twilight occurs when the center of the sun is between 6 and 12 degrees below the horizon

Nautical dawn is the time when the sun is 12 degrees below the horizon in the morning.

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