Nautical twilight is the period after civil twilight. Between which depressions of the sun's centre below the sensible horizon does it fall?
DGCA Air Navigation question paper, May 2025
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By roughly how many degrees is the Earth's equatorial plane inclined to the ecliptic?
At the moment civil twilight ends and nautical twilight begins, where is the centre of the sun?
Why does the length of the apparent solar day change through the year?
About how long is a sidereal year?
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