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 when the center of the sun is 6 degrees below the horizon; ends at sunrise
CIVIL DUSK
In the evening, it begins at sunset; ends when the center of the sun is 6 degrees below the horizon
Civil twilight is the brightest form of twilight. There is enough natural sunlight that artificial light may not be required to carry out outdoor activities
3
44 reads
CURATED FROM
IDEAS CURATED BY
Jack of all people-related trades, master of none. Majored in Psychology, Customer Service Assoc for a few Years, HR Officer for 4, Manager and ESL Teacher for over 11 yrs now, an artist since birth.
The idea is part of this collection:
Learn more about personaldevelopment with this collection
How to apply new knowledge in everyday life
Why continuous learning is important
How to find and evaluate sources of knowledge
Related collections
Similar ideas to Civil Twilight: Practical Twilight
Nautical Twilight
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.
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...
Read & Learn
20x Faster
without
deepstash
with
deepstash
with
deepstash
Personalized microlearning
—
100+ Learning Journeys
—
Access to 200,000+ ideas
—
Access to the mobile app
—
Unlimited idea saving
—
—
Unlimited history
—
—
Unlimited listening to ideas
—
—
Downloading & offline access
—
—
Supercharge your mind with one idea per day
Enter your email and spend 1 minute every day to learn something new.
I agree to receive email updates