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Civil twilight is the brightest of the twilight phases. How is it defined and when does it start and end? What are civil dawn and civil dusk?
In the morning, civil twilight begins when the Sun is 6 degrees below the horizon and ends at sunrise. In the evening, it begins at sunset and ends when the Sun reaches 6 degrees below the horizon. Civil dawn is the moment when the center of the Sun is 6 degrees below the horizon in the morning.
Civil twilight is the time when the geometric center of the Sun is between the horizon and 6° below the horizon. [3] [4] [5] Civil twilight is the period when enough natural light remains that artificial light in towns and cities is not needed.
5 de jul. de 2023 · Most of us think of twilight as a single period of transition from bright day to deep night, but there are actually three twilights: civil, nautical, and astronomical.
Civil Twilight: Begins in the morning, or ends in the evening, when the geometric center of the sun is 6 degrees below the horizon. Therefore morning civil twilight begins when the geometric center of the sun is 6 degrees below the horizon, and ends at sunrise.
27 de ago. de 2023 · The official definition of civil twilight is the time from when the sun disappears until the sun’s center is 6 degrees below the horizon. A measurement of 6 degrees...
1 de fev. de 2022 · Civil twilight is the lightest (or least dark) of the three—when the sun is between 0 and 6 degrees below the horizon. In general, the term twilight most commonly refers to the period after sunset before total darkness, but it can also refer to the period before sunrise.
