What label did the ancient Greeks assign to the luminous streak, translating literally to 'Milky Circle'?

Answer

Galaxias Kuklos

The specific naming convention adopted into Western astronomy originates from the ancient Greek interpretation of the celestial feature. They visually identified the luminous streak, characterized by its milky color and apparent arc across the heavens, and named it *Galaxias Kuklos*. This phrase precisely captures the dual nature of the observation: 'Galaxias' relating to milkiness and 'Kuklos' denoting the circular or arched shape perceived in the sky. This precise nomenclature is what directly contributed the root word for the modern term 'galaxy.'

What label did the ancient Greeks assign to the luminous streak, translating literally to 'Milky Circle'?

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