English Lexicon

Radio Astronomy

/ˌreɪdi.oʊ əˈstrɒn.ə.mi/
nounCEFR B2 (Upper)Top #25000 frequency
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Comprehensive Definitions & Senses

1 sense
As noun
  1. 1

    The branch of astronomy that studies celestial bodies by means of the radio waves they emit.

    "Radio astronomy has allowed scientists to discover pulsars and map the structure of our galaxy."

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Linguistic Origin & Historical Etymology

Coined in the 20th century, combining 'radio' (referring to radio waves discovered in celestial sources by Karl Jansky around 1932) and 'astronomy' (from Greek astron 'star' + nomos 'law').

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