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astronomy

noun [U]
 
 
/əˈstrɒn.ə.mi/ US  /-ˈstrɑː.nə-/

Definition

C2 the scientific study of the universe and of objects that exist naturally in space, such as the moon, the sun, planets, and starsAstronomy - general words
(Definition of astronomy noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

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