In both astrology and historical astronomy, the zodiac (Greek: ζῳδιακός, zōidiakos) is a circle of twelve 30° divisions of celestial longitude that are centered upon the ecliptic: the apparent path of the Sun across the celestial sphere over the course of the year. The paths of the Moon and visible planets also remain close to the ecliptic, within the belt of the zodiac, which extends 8-9° north or south of the ecliptic, as measured in celestial latitude. Historically, these twelve divisions are called signs. Essentially, the zodiac is a celestial coordinate system, or more specifically an ecliptic coordinate system, which takes the ecliptic as the origin of latitude, and the position of the sun at vernal equinox as the origin of longitude.

Read more about Zodiac:  Usage, The Twelve Signs, Zodiacal Constellations, Table of Dates, Precession of The Equinoxes, In Modern Astronomy, Mnemonics, Unicode Characters

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Landscape Zodiac
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Famous quotes containing the word zodiac:

    We need not feel ashamed of flirting with the zodiac. The zodiac is well worth flirting with.
    —D.H. (David Herbert)