nautical twilight


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nautical twilight

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9) NATO (April 1949) The Warsaw Pact was formed in 1955 after West Germany joined NATO (10) Beginning Morning Nautical Twilight and End Evening Nautical Twilight ("First light" and "Last light").
Nautical Twilight is another who returns following a near-miss at the end of October.
Nautical twilight is from the end of civil twilight to the time that the Sun is 12[degrees] below the horizon, which ends when the boundary between sea and sky is no longer discernible.
As nautical twilight ends at the beginning of October Mars is already at an altitude of 35[degrees], meaning that it rises 4% hours ahead of the Sun.