astronomical day

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

The astronomical day based on the sun, is 24 hours long, as said before.

From Lectures in Navigation by Draper, Ernest Gallaudet

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

One of the objects of the third resolution is to make the new universal day coincide with the civil day rather than 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

The civil day always commences at the midnight preceding this astronomical day.

From Notes and Queries, Vol. IV, Number 105, November 1, 1851 A Medium of Inter-communication for Literary Men, Artists, Antiquaries, Genealogists, etc. by Various

A vigorous effort was made during the last fifteen years of the 19th century to bring the two uses into harmony by beginning the astronomical day at midnight.

From Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 10 "David, St" to "Demidov" by Various