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Why is twilight longer at higher latitudes?

Updated: 8/11/2023
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Alexftalbott

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14y ago

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The sun sets in a more slanted/diagonal direction at high latitude locations throughout the year (which is why twilight at these locations can be more than two whole hours), whereas at tropical latitudes the sun sets in a near vertical direction so the twilight period can only be 45-50 minutes.

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Leilani Cremin

Lvl 13
2y ago
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14y ago

Twilight is the light of the sun below the horizon bouncing off the atmosphere above us. The twilight band is equal width around the world. However, points nearer the north pole or south pole move through the band slower than points nearer the equator, so they remain in the twilight band longer. They move slower because they have less distance to complete the shorter 24-hour latitudinal circle just like the equator has 24 hours to complete it.

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10y ago

The sun sets in a more slanted/diagonal direction at high latitude locations throughout the year (which is why twilight at these locations can be more than two whole hours), whereas at tropical latitudes the sun sets in a near vertical direction so the twilight period can only be 45-50 minutes.

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