astronomy

noun

as·​tron·​o·​my ə-ˈsträ-nə-mē How to pronounce astronomy (audio)
plural astronomies
: the study of objects and matter outside the earth's atmosphere and of their physical and chemical properties

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The Difference Between Astronomy and Astrology

Some may find it easy to confuse astronomy and astrology. At one time, these two words actually were synonymous (that is, astronomy once meant what astrology means today), but they have since moved apart from each other. In current use, astronomy is concerned with “the study of objects and matter outside the earth's atmosphere,” while astrology is the purported divination of how stars and planets influence our lives. Put bluntly, astronomy is a science, and astrology is not.

Examples of astronomy in a Sentence

Recent Examples on the Web The resort has a daily rotating list of activities guests can participate in, from relaxing classes like barefoot tai chi to adrenaline-pumping water skiing to educational cooking or astronomy classes — at Lake Austin Spa Resort, the world is your oyster. Taylor McIntyre, Travel + Leisure, 2 July 2024 The students compete in hands-on and lab events covering topics in engineering, physics, epidemiology, astronomy, chemistry, robotics and coding. Anne Gelhaus, The Mercury News, 30 June 2024 This all may seem like a lark, a silly bit of fun at the expense of astronomy. Phil Plait, Scientific American, 28 June 2024 And why is math so uncannily effective at explaining it, not just in physics, but also in chemistry, in astronomy, and even in some parts of biology? Quanta Magazine, 20 June 2024 See all Example Sentences for astronomy 

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'astronomy.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

Etymology

Middle English astronomie "study of celestial bodies, including their possible influence on human affairs," borrowed from Anglo-French & Latin; Anglo-French astronomie, borrowed from Latin astronomia, borrowed from Greek astronomía "study of the stars, especially their movements," from astro- astro- + -nomia -nomy

First Known Use

12th century, in the meaning defined above

Time Traveler
The first known use of astronomy was in the 12th century

Dictionary Entries Near astronomy

Cite this Entry

“Astronomy.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/astronomy. Accessed 15 Jul. 2024.

Kids Definition

astronomy

noun
as·​tron·​o·​my ə-ˈsträn-ə-mē How to pronounce astronomy (audio)
plural astronomies
: the science of the heavenly bodies and of their sizes, motions, and composition
astronomer
-mər
noun

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