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astronomical day



Example Sentences

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Since the civil day begins 12 hours before the astronomical day and ends 12 hours before it, A.M. of a new civil day is P.M. of the astronomical day preceding.

From Lectures in Navigation by Draper, Ernest Gallaudet

You remember that we have learned that astronomical time is reckoned from noon of one day to noon of the next and hence the astronomical day corresponds to the 24 hours of a ship's run.

From Lectures in Navigation by Draper, Ernest Gallaudet

Foreigners, however, ordinarily commence the astronomical day at midnight, at least those of France, Germany, Italy, and Spain do.

From Notes and Queries, Vol. IV, Number 101, October 4, 1851 A Medium of Inter-communication for Literary Men, Artists, Antiquaries, Genealogists, etc. by Various

In the Conference at Rome the universal day was made to coincide with the astronomical day.

From International Conference Held at Washington for the Purpose of Fixing a Prime Meridian and a Universal Day. October, 1884. Protocols of the Proceedings by Various

To find when a certain star will cross your meridian, take from the Nautical Almanac, the R.A. of the Mean Sun for Greenwich Mean Noon of the proper astronomical day.

From Lectures in Navigation by Draper, Ernest Gallaudet




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