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 theGreek 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 orseven planets of the ancients.[1]