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 wrinkles aren't dealbreakers, but rather invitations for astronomers to refine their cosmic blueprints. —Paul Sutter, Space.com, 23 Mar. 2026

The observatory runs ticketed nightly observing sessions as well as the chance to experience Kitt Peak as a visiting astronomer, with all-night access to its public telescopes and accommodations in the stargazing hub’s dorm rooms. —Stephanie Vermillion, Outside, 23 Mar. 2026

Chris Impey, an astronomer from the University of Arizona, attended a workshop where scientists across disciplines came together to try to understand how and why systems in the universe – from organisms to languages and information – change or grow more complex over time. —Mary Magnuson, The Conversation, 20 Mar. 2026

So this dramatic update to its cosmic history might lead astronomers to revisit those comparisons. —Joseph Howlett, Scientific American, 19 Mar. 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