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Sunrise Time Calculator Knowledge Check
Sharpen your sunrise time calculator skills with algorithmically generated problems. Each attempt produces unique values to test your formula knowledge.
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During morning twilight, the beautiful 'blue hour' starts when the sun is 8° below the horizon (at 332 minutes after midnight) and ends when the sun is 4° below the horizon (at 384 minutes after midnight). How many minutes does this blue hour window last?
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