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noun 
  1. (context, obsolete, historical, ,, or, astrology) Each of the seven major bodies which move relative to the fixed stars in the night sky"the Moon, Mercury, Venus, the Sun, Mars, Jupiter and Saturn.
  2. (astronomy) Any of various rocky or gaseous spherical bodies orbiting the Sun, specifically the eight major bodies of Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune. The Galilean moons, four asteroids and the dwarf planet Pluto were formerly included, in the 17th, 19th and 20th centuries respectively.
  3. (context, astronomy, by extension) Any similar spherically-shaped body, in orbit around a star or binary star, which dominates its orbit in size but is not massive enough for fusion.
Etymology: From (term, planeta, lang=la), (term, planetes, lang=la) < Ancient Greek (term, sc=polytonic, , tr=planÄtÄs, lang=grc) variant of (term, sc=polytonic, , tr=planÄs, , wanderer, planet, lang=grc).


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