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

The discovery opens the door for astronomers and astrochemists to search for even larger PAHs and related molecules. —Victoria Corless, Space.com, 30 June 2025

The astronomers are perplexed as to how these particles would escape such a powerful black hole to create these clusters. —Nick Butler, FOXNews.com, 28 June 2025

Here's what to know about the strange signal, and how astronomers tracked it to a defunct NASA satellite. —Eric Lagatta, USA Today, 28 June 2025

But in a new study published Wednesday in the journal Nature, astronomers describe the first time the JWST has captured a photo of an exoplanet. —Margherita Bassi, Smithsonian Magazine, 27 June 2025

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