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Solar year's excess over lunar year
Answer for the clue "Solar year's excess over lunar year ", 5 letters:
epact
Alternative clues for the word epact
Word definitions for epact in dictionaries
Wiktionary
Word definitions in Wiktionary
n. the time (number of days) by which a solar year exceeds twelve lunar months; it is used in the calculation of the date of Easter
Usage examples of epact.
S, the epact J must be diminished by unity every centesimal year, excepting always the fourth.
M, we have already stated that in the Gregorian calendar the epacts are increased by unity at the end of every period of 300 years seven times successively, and then the increase takes place once at the end of 400 years.
In those years in which the line of epacts is changed in the Gregorian calendar, the golden numbers are removed to different days, and of course a new table is required whenever the solar or lunar equation occurs.
Instead, however, of employing the golden numbers and epacts for the determination of Easter and the movable feasts, it was resolved that the equinox and the paschal moon should be found by astronomical computation from the Rudolphine tables.
It is fortunate that the difference is one of eleven days, for as that is the number which is added every year to the epact our epacts are almost the same.
In the first side of the Cube (id est the Chronoscopium Universalis) you can see eight wheels arranged in perennial cycles represent the Calendars of Julius and of Gregory, and when recur the Sundays and the Epacts, and the Solar Circle, and the Moveable and Paschal Feasts, and novilunes and plenilunes, quadratures of the sun and moon.