Twilight
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Twilight is daylight illumination produced by diffuse sky radiation when the Sun is below the horizon as sunlight from the upper atmosphere is scattered in a way that illuminates both the Earth's lowe
Twilight over a lake
Twilight as viewed from space
Midtown Manhattan during civil twilight, demonstrating blue hour
Civil twilight in a small town in the Mojave Desert
Dawn
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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 h
Twilight
…illuminates both the Earth's lower atmosphere and also the Earth's surface. Twilight also may be any period when this illumination occurs, including dawn and dusk. The lower the Sun is beneath the horizon, the dimmer the sky (other factors such as atmospheric conditions being equal). When the Sun reaches…
Late summer dawn over the Mojave Desert, California
Dawn at La Silla Observatory, Chile
Dawn over Serra dos Órgãos National Park, Rio de Janeiro state, Brazil
L'aurore, Mer du Nord by Guillaume Vogels, c. 1877