astronomer

noun

as·​tron·​o·​mer ə-ˈsträ-nə-mər 

: 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

These effects can alter how the atom absorbs the light and, therefore, change how astronomers see that light. — Rahul Rao, Space.com, 23 July 2026

That means astronomers will have to start coming up with better definitions for what constitutes an exomoon versus an exoplanet in the first place. — Adam Kovac, Scientific American, 22 July 2026

Its huge, almost star-like bulk was great enough that astronomers could detect it with an ordinary optical telescope. — Jeffrey Kluger, Time, 22 July 2026

Jeffrey Hoffman worked as an astronomer throughout the 1970s. — Encyclopedia Britannica, 22 July 2026

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

Rhymes for astronomer

• ionomer
• monomer