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Nautical twilight is the second twilight phase when the Sun is 6 to 12 degrees below the horizon. Learn how to distinguish it from civil and astronomical twilight, and see how it varies by latitude and season.
Nautical twilight occurs when the center of the Sun is between 6 degrees and 12 degrees below the horizon. This twilight period is less bright than civil twilight and artificial light is generally required for outdoor activities. Nautical dawn occurs when the Sun is 12 degrees below the horizon during the morning.
Twilight is the light produced by sunlight scattering in the atmosphere when the Sun is below the horizon. Learn about the three subcategories of twilight: civil, nautical, and astronomical, and how they vary by latitude and season.
Jul 5, 2023 · Learn how the sun's position and Earth's rotation define the three twilights that mark the transition from day to night. Nautical twilight is when the sun is 6 degrees below the horizon and you can still see the horizon, but not read without artificial light.
- Gemma Tarlach
Nautical Twilight is also known as Nautical Dawn and Nautical Dusk. Astronomical Twilight: Begins in the morning, or ends in the evening, when the geometric center of the sun is 18 degrees below the horizon.
Apr 25, 2024 · When the sun is six to 12 degrees below the horizon, that’s nautical twilight, which comes before civil twilight in the morning and after civil twilight in the evening. “Nautical twilight is when we begin to see the brightest planets and the stars start to come out,” Epstein said.
Blue hour is the period of twilight when the Sun is at a significant depth below the horizon and the remaining sunlight takes on a mostly blue shade. Learn about the explanation, times, and photography of this phenomenon, also known as nautical twilight.
