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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 brightest of the twilight phases. How is it defined and when does it start and end? What are civil dawn and civil dusk?
At the winter solstice within the polar circle, twilight can extend through solar noon at latitudes below 72.561° (72°33′43″) for civil twilight, 78.561° (78°33′43″) for nautical twilight, and 84.561° (84°33′43″) for astronomical twilight.
21 de nov. de 2023 · Civil twilight starts at sunset and ends roughly 45 minutes later, when the sun’s center has plunged six degrees below the horizon—equal to 12 times its own width. That’s when streetlights must be on, according to most municipal ordinances. Nautical twilight occurs when the sun’s center is between 6 and 12 degrees below the horizon.
27 de fev. de 2024 · The three twilight types are civil, nautical and astronomical twilight. Civil twilight is the brightest phase of twilight, while astronomical twilight is the darkest, and occurs just before or after night.
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 · During civil twilight, there’s enough light to see, but people turn on their lights to drive a car, and the streetlights are starting to come on. The brightest planets appear during civil...
