Definition of astronomy noun from the Oxford Advanced Learner's Dictionary

 

astronomy

 noun
noun
BrE BrE//əˈstrɒnəmi//
 
; NAmE NAmE//əˈstrɑːnəmi//
 
[uncountable] The universe
 
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the scientific study of the sun, moon, stars, planets, etc. Wordfinderasteroid, astronomy, comet, constellation, cosmic, galaxy, meteorite, orbit, space, the universe See related entries: The universe Word Origin Middle English (also denoting astrology): from Old French astronomie, from Latin astronomia, from Greek, from astronomos (adjective) ‘star-arranging’.
See the Oxford Advanced American Dictionary entry: astronomy

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