The Moon is the large, round object that orbits Earth and shines at night by reflecting the Sun’s light. More generally, a moon is any natural satellite that orbits a planet.
From Old English “mōna,” from Proto-Germanic “*mēnô,” related to words for the Moon in many Indo-European languages. The root is also linked to words for measuring time and months.
The Moon is not just a rock in the sky—its cycles quietly structure words like month and Monday. Long before clocks, people used its changing face as their first big calendar.
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