![]() See the Almanac’s sunrise/set calculator to get all three twilight times!īy the way, twilight is different than dusk, which occurs after sunset. The conclusion of this stage of twilight heralds the arrival of full darkness. After this point, the faintest stars emerge. Astronomical twilight occurs when the sun’s center is between 12 and 18 degrees below the horizon.After this, the horizon vanishes, when a mariner cannot distinguish between sea and sky. Nautical twilight occurs when the sun’s center is between 6 and 12 degrees below the horizon.That’s when streetlights must be on, according to most municipal ordinances. 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.These stages also occur before sunrise, in the reverse order. Below describe the stages of twilight as they occur in the evening. And there’s really not one twilight but three! And they’re each so distinct, they have their own names. But in actuality, it’s a very specific event. ![]() What is the correct definition of twilight? The concept suggest vagueness. Image: Earth at twilight. Blue sunlight fades into darkness. The Captivating Crescent Moon: All About the Crescent Moon Phase
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