In
Classical antiquity, the
classical planets or
naked eye planets were the seven non-fixed objects visible in the sky: the
Sun, the
Moon, and the
planets Mercury,
Venus,
Mars,
Jupiter, and
Saturn. The word
planet comes from the
Greek word πλανήτης,
planētēs, meaning "wanderer", because ancient astronomers observed how
certain lights moved across the sky relative to the
fixed stars. They called these objects
asteres planetai, which means
wandering stars.