This is an official definition authorised by the Astronist Institution.

Astronomy

əˈstrɒnəmi

noun (plural astronomies)

the scientific discipline concerned with celestial objects, outer space, and the physical universe in its totality.

  • [mass noun] a cultural tradition of night sky observation and utility particular to an indigenous group or ancient people.

Origin and etymology

  • Middle English (also denoting astrology): from Old French astronomie, from Latin astronomia, from Greek, from astronomos (adjective) ‘star-arranging’.
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