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Classical planet
In antiquity, the classical planets or naked eye planets were the seven non-fixed objects visible in the sky. The classical planets were, therefore, the Sun and Moon and the five planets Mercury, Venus, Mars, Jupiter, and Saturn. The name planet comes from the Greek term πλανήτης, ''planētēs'', meaning "wanderer", as ancient astronomers noted how certain lights moved across the sky with the other stars. They called these objects ''asteres planetai'', or wandering stars. Together they form the seven classical planets or seven planets of the ancients.〔(Classification of the Planets )〕
==Babylonian astronomy==
Babylonians recognized seven planets. A bilingual list in the British Museum records the seven Babylonian planets in this order:
〔Mackenzie, ''Myths of Babylonia and Assyria'' (1915), chapter 13 "Astrology and Astronomy"()〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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