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

To answer these questions, a team of astronomers searched further afield, looking for faint satellite galaxies around three galaxies. — Robert Lea, Space.com, 17 Sep. 2026

Many astronomers still argue that little red dots are traditional black holes — even the new duo. — Quanta Magazine, 14 Sep. 2026

Energy from these impacts generated massive amounts of heat, which Mercury has been losing ever since, according to astronomers. — Eric Lagatta, USA Today, 11 Sep. 2026

Its observations provide astronomers with a powerful tool for studying the distribution of hydrogen and, consequently, the structure and evolution of galaxies. — Prabhat Ranjan Mishra, Interesting Engineering, 10 Sep. 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