Julian days begin at noon because when Herschel recommended them, the astronomical day began at noon.
2.
The first astronomical day of summer will begin in typical fashion across the nation on Thursday.
3.
The astronomical day had begun at noon ever since Ptolemy chose to begin the days in his astronomical periods at noon.
4.
The " Baopuzi " lists ways to protect oneself from mountain demons associated with different astronomical days ( chap . 17, tr.
5.
The astronomical day was shifted from noon, twelve hours after midnight, to midnight effective by a resolution of the newly formed International Astronomical Union.
6.
"Iraq has asked Kofi Annan and the world community . . . to halt aerial military action by the United States and Britain during this scientific and astronomical day, " the magazine said.
7.
Astronomical days were historically used by astronomers ( in contrast most commonly to solar days ), but since the Industrial Revolution this usage has generally fallen out of favor, in order to avoid confusion with more conventional timekeeping.
8.
In 1935, the term " Universal Time " was recommended by the International Astronomical Union as a more precise term than Greenwich Mean Time, because GMT could refer to either an astronomical day starting at noon or a civil day starting at midnight.
9.
The first two of these days are astronomical days . The time needed for the mean sun to pass through one of the twelve traditional signs of the zodiac ( the twelve " khyim " ) is called " khyim zla " ( solar month ).
10.
By changing the start of the astronomical day from midday to midnight, the conference avoided an issue raised by the Geodetic Conference of a change of date happening in the middle of the day in Europe, so that the International Date Line could be where we now have it.
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