Dawn
Dawn is the time that marks the beginning of twilight before sunrise. It is recognized by the appearance of indirect daylight being scattered in Earth's atmosphere, when the centre of the Sun's disc has reached 18° below the observer's horizon.
Dawn is the time that marks the beginning of twilight before sunrise. It is recognized by the appearance of indirect daylight being scattered in Earth's atmosphere, when the centre of the Sun's disc has reached 18° below the observer's horizon.
Dawn is the time that marks the beginning of twilight before sunrise. It is recognized by the appearance of indirect daylight being scattered in Earth's atmosphere, when the centre of the Sun's disc has reached 18° below the observer's horizon.
Source: Wikipedia "Dawn" · CC BY-SA 4.0
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