December

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December:

see monthmonth,
in chronology, the conventional period of a lunation, i.e., passage of the moon through all its phases. It is usually computed at approximately 29 or 30 days. For the computation of the month and its harmony with the solar calendar and for the months in others than the
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first point of Capricornus

first point of Capricornusclick for a larger image
That point on the ecliptic occupied by the sun at the maximum southerly declination. Sometimes called the December solstice, the first point of Capricornus. The same as the winter solstice, the first point of Libra. The point of the intersection of the ecliptic and the celestial equator (equinoctial). When the sun is moving from the north to the south direction. It is denoted by the symbol image. Also called the winter, or December, equinox.
References in classic literature ?
The accumulation of the clouds in the atmosphere prevented all observation on the 5th, 6th, 7th, 8th, 9th, and 10th of December.
At length, to the general satisfaction, a heavy storm cleared the atmosphere on the night of the 11th and 12th of December, and the moon, with half-illuminated disc, was plainly to be seen upon the black sky.
The members of the Gun Club ought, therefore, without delay, to commence the works necessary for such an experiment, and to be prepared to set to work at the moment determined upon; for, if they should suffer this 4th of December to go by, they will not find the moon again under the same conditions of perigee and of zenith until eighteen years and eleven days afterward.
Once more, then, on the 21st of December, they set out upon their wayfaring, with newly excited spirits.
At an early hour of the morning, December 23d, they began to cross the river.
The lady not being at hand to speak for herself, her guardian had decided, in her absence, on the earliest day mentioned--the twenty-second of December, and had written to recall us to Limmeridge in consequence.