astronomer

noun

as·​tron·​o·​mer ə-ˈsträ-nə-mər How to pronounce astronomer (audio)
: a person who is skilled in astronomy or who makes observations of celestial phenomena

Examples of astronomer in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
While researching my book, astronomer Geoff Marcy, a co-discoverer of several of the first hot Jupiters, quipped that in 30 years-time his own role in exoplanet hunting would seem obsolete. Bruce Dorminey, Forbes.com, 19 Sep. 2025 Finding additional examples could help astronomers better understand how often such ejections occur and shed new light on the complex life cycles of the universe's smallest galaxies. Sharmila Kuthunur, Space.com, 19 Sep. 2025 Even though the planets are in reality still tens of millions of miles apart, the events present a special opportunity for astronomers and casual stargazers to see multiple worlds in our solar system at one time. Eric Lagatta, USA Today, 18 Sep. 2025 The planet is part of a planetary system about 40 light-years away from Earth called TRAPPIST-1, which five Belgian astronomers discovered in 2016 and named after their favorite beer. Jacopo Prisco, CNN Money, 18 Sep. 2025 See All Example Sentences for astronomer

Word History

Etymology

Middle English, "one versed in astronomy or astrology," from astronomie astronomy + -er -er entry 2

Note: Alternatively, Oxford English Dictionary, third edition, and Middle English Dictionary see the English word as derived from Medieval and Late Latin astronomus "astronomer" (borrowed from Greek astronómos) plus the agent suffix -er.

First Known Use

14th century, in the meaning defined above

Time Traveler
The first known use of astronomer was in the 14th century

Cite this Entry

“Astronomer.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/astronomer. Accessed 24 Sep. 2025.

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