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( Tropical zodiac)
Zodiac denotes an annual cycle of twelve stations along the ecliptic, the apparent path of the sun across the heavens through the constellations that divide the ecliptic into twelve equal zones of celestial longitude. The zodiac is recognized as the first known celestial coordinate system. Babylonian astronomers developed the zodiac of twelve signs. The etymology of the term zodiac is that it comes from the Latin zodiacus, from the Greek ??d?a??? [??????], meaning "circle of animals", derived from ??d???, the diminutive of ???? "animal". However, the classical Greek zodiac also includes signs (also constellations) that are not represented by animals (e.g., Aquarius, Virgo, Gemini and for some Libra). Another suggested etymology is that the Greek term is cognate with the Sanskrit sodi, denoting "a path", i.e., the path through which the Sun travels.[citation needed] The zodiac also means a region of the celestial sphere that includes a band of eight arc degrees above and below the ecliptic, and therefore encompasses the paths of the Moon and the naked eye planets (Mercury, Venus, Mars, Jupiter, and Saturn). The classical astronomers called these planets wandering stars to differentiate them from the fixed stars of the celestial sphere (Ptolemy). Astrologers understood the movement of the planets and the Sun through the zodiac as a means of explaining and predicting events on Earth. The modern western astrological signs are simplifications of conventional pictorial hi representations of the signs, used since Hellenistic times. The characters are encoded in unicode at positions U+2648 to U+2653 (hexadecimal numbers).The glyph representation of these characters will depend on the font in which they are displayed. Below are the Roman names of the signs of the zodiac (with the ecliptic longitudes of their june first points). These figures represent the ecliptic longitudes for each sign of 30° longitude. In terms of
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