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astronomy

Today it means: The study of the physical universe beyond the Earth's atmosphere, including the process of mapping locations and properties of the matter and radiation in the universe. Full definition →

Middle English astronomie ← Old French astronomie

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The story

Old French · derived fromastronomie
Middle English · inherited fromastronomie
English todayastronomy

From Middle English astronomie, astronemy, from Old French astronomie, equivalent to astro- + -nomy. Displaced native Old English tungolcræft.

Etymology from Wiktionary, CC BY-SA 4.0.