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

Even so, astronomers don’t know if there would have been enough gas around to produce the biggest black holes. — Quanta Magazine, 2 July 2026

The depth and detail will enable astronomers to chart new planets, new asteroids, new galaxies and other, rarer objects. — Miriam Waldvogel, Washington Post, 30 June 2026

Other astronomers accuse him of making exotic claims with little evidence. — CBS News, 1 July 2026

Every summer, the park hosts a three-day astronomy festival that brings space scientists, amateur astronomers, and youth groups together to learn about the night sky. — Scott Bay, Travel + Leisure, 2 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