Science / Astrology / Lunation Cycle: The Moon's phases relative to the Sun as it moves from one new Moon (Moon/sun conjunction) to the next; the time interval between two successive lunations (new Moons), approximately twenty-nine and on MORE
Science / Astrology / Embolism Lunation: The Moon's position when the natal lunar phase angle (relative position between Moon and sun in a natal horoscope) is repeated. It is believed that women can conceive during the time each month that t MORE
Science / Astrology / Periodical Lunation: Term applied to the transiting Moon's monthly return to the exact position occupied in a natal horoscope. See also lunar period. MORE
Science / Astrology / Metonic Cycle: The nineteen-year cycle named for the Athenian astronomer Meton who discovered (ca. 432) that the new Moon occurs on the same day of the year at approximate nineteen-year intervals. MORE
Science / Tides and Currents / Callippic Cycle: A period of four Metonic cycles equal to 76 Julian years, or 27,759 days. Devised by Callippus, a Greek astronomer, about 350 B.C., as a suggested improvement on the Metonic cycle for a period in whic MORE