Online Encyclopedia

SYNODIC PERIOD

Online Encyclopedia
Originally appearing in Volume V26, Page 295 of the 1911 Encyclopedia Britannica.
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SYNODIC PERIOD, in astronomy, the apparent period of a planet or satellite when its revolution is referred to the line passing through the earth or the sun. In the case of the planets it is the period between successive conjunctions of the same kind, inferior or superior, with the sun. In the case of the satellites it is the period relative to the radius vector from the sun.
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