draconic period
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draconic month — noun A period of time between two consecutive passages of the Moon through the same orbital node. The draconic month is shorter than sidereal month, due to precession of the Moons orbit. It equals approximately 27 days 5 hours 5 minutes 35.8… … Wiktionary
Orbital period — For the music album, see Orbital Period (album). The orbital period is the time taken for a given object to make one complete orbit about another object. When mentioned without further qualification in astronomy this refers to the sidereal period … Wikipedia
nodical month — noun : the mean time of the moon s revolution in its orbit from ascending node to ascending node equal to 27 days, 5 hours, 5 minutes, 35.8 seconds of mean solar time called also draconic period … Useful english dictionary
Eclipse cycle — Animated graph of a the paths of totality of a solar eclipse cycle. Eclipses may occur repeatedly, separated by certain intervals of time: these intervals are called eclipse cycles.[1] The series of eclipses separated by a repeat of one of these… … Wikipedia
Month — For the Egyptian hawk god, see Monthu. A month is a unit of time, used with calendars, which was first used and invented in Mesopotamia, as a natural period related to the motion of the Moon; month and Moon are cognates. The traditional concept… … Wikipedia
Saros (astronomy) — The saros i/ˈsɛərɒ … Wikipedia
Year — A year (from Old English gēar) is the orbital period of the Earth moving around the Sun. For an observer on Earth, this corresponds to the period it takes the Sun to complete one course throughout the zodiac along the ecliptic. In astronomy, the… … Wikipedia
Saros cycle — The Saros cycle is an eclipse cycle with a period of about 18 years 11 days 8 hours (approximately 6585⅓ days) that can be used to predict eclipses of the Sun and Moon. One Saros after an eclipse, the Sun, Earth, and Moon return to approximately… … Wikipedia
eclipse — eclipser, n. /i klips /, n., v., eclipsed, eclipsing. n. 1. Astron. a. the obscuration of the light of the moon by the intervention of the earth between it and the sun (lunar eclipse) or the obscuration of the light of the sun by the intervention … Universalium
Orbit of the Moon — Not to be confused with Lunar orbit in the sense of a selenocentric orbit, that is, an orbit around the Moon The Moon completes its orbit around the Earth in approximately 27.3 days (a sidereal month). The Earth and Moon orbit about their… … Wikipedia
