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astronomy

Etymology and origin of the English word astronomy

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Pronunciation

  • IPA: /əˈstɹɒn.ə.mi/ (UK); /əˈstɹɑ.nə.mi/, /æsˈtɹɑ.nə.mi/ (US)[1]

Etymology

It is inherited from Middle English astronomie, borrowed from Old French astronomie,[2][3][4][5][6] from Latin astronomia,[2][3][4][5][6] from Ancient Greek ἀστρονομία (astronomía),[2][3][4] from astronómos “star-arranger”,[3][4] from Ancient Greek ἄστρον (ástron, “star”) + -νομία (-nomía, “arrangement, law”).[2][3][4][5]

Earliest recorded meaning

The science of the heavenly bodies (1205 in the OED; before 1200 in Barnhart).[7][3][4]

Semantic evolution

In English, astronomy is older than astrology and at first covered both the scientific study of the stars and their supposed influence on human affairs;[4][7] in the 14th and 15th centuries the two words were interchangeable.[3] During the late 15th century a distinction developed between the scientific study and the reading of human destiny,[3][4] and astronomy became the science of the matter beyond the Earth's atmosphere.[2][5][6]

Timeline

  • before 1200 – astronomy and astrology (Barnhart).[3]
  • 1205 – the science of the heavenly bodies (OED).[7]
  • before 1300 – astronomien, astronomer.[3]
  • before 1398 – astronomer.[3]
  • late 15th century – distinguished from astrology.[3][4]

Modern meaning

Noun

  1. The scientific study of matter in outer space, especially the positions, size, motion, composition and evolution of celestial bodies and phenomena.
  2. (obsolete) Astrology.

Word family

  • astronomer
  • astral
  • astrology
  • astronomical
  • astrometry
  • astrophysics
  • cosmology
  • star

Usage notes

Wiktionary notes that the study of the physical processes governing matter and energy in the universe is commonly called astrophysics, and the study of the origin and fate of the universe cosmology.[1]

References

  1. ^ a b Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c d e The American Heritage Dictionary of the English Language (1992), 3rd ed., Boston: Houghton Mifflin
  3. ^ a b c d e f g h i j k l Barnhart, Robert K., ed. (1995), The Barnhart Concise Dictionary of Etymology, New York: HarperCollins
  4. ^ a b c d e f g h i Harper, Douglas, Online Etymology Dictionary, https://www.etymonline.com
  5. ^ a b c d Merriam-Webster's Collegiate Dictionary (2003), 11th ed., Springfield, Mass.: Merriam-Webster
  6. ^ a b c Random House Webster's Unabridged Dictionary (1999), 2nd ed., New York: Random House
  7. ^ a b c Simpson, J. A.; Weiner, E. S. C., eds. (1989), The Oxford English Dictionary, 2nd ed., Oxford: Clarendon Press

Related etymologies

Cite this entry

“Astronomy.” Etymologically, 11 Oct. 2026, etymologically.com/en/astronomy. Accessed 11 Oct. 2026.

Last edited on . ·