Technical Definitions
There are also more technical definitions of dawn, including the following:
- Astronomical dawn
- the moment after which the sky is no longer completely dark; formally defined as the time at which the sun is 18 degrees below the horizon in the morning.
- Nautical dawn
- the time at which there is enough sunlight for the horizon and some objects to be distinguishable; formally, when the sun is 12 degrees below the horizon in the morning.
- Civil dawn
- that time at which there is enough light for objects to be distinguishable, so that outdoor activities can commence; formally, when the sun is 6 degrees below the horizon in the morning.
Read more about this topic: Dawn
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