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Astronomical twilight occurs when the sun is 18 degrees below the horizon. During this period, the sky is dark with no color and stars are visible. It is the preferred time for astrophotography, though terrestrial objects cannot be seen clearly without artificial light. Nautical twilight occurs when the sun is between 6-12 degrees below the horizon, allowing the horizon to be seen on a moonless night. Civil twilight begins at sunset when the sun is 6 degrees below the horizon, and ends when it reaches that

Author

be_kind4all

Language

EN