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

This comes after a prominent anti-light pollution group and astronomers have been urging the public to weigh in. —Michael Kan, PC Magazine, 7 Mar. 2026

Even though the planets are in reality still tens of millions ― or even billions ― of miles apart, the events present a special opportunity for astronomers and casual stargazers to see multiple worlds in our solar system at one time. —Jordan Green, Memphis Commercial Appeal, 6 Mar. 2026

Even though the planets are in reality still tens of millions – or even billions – of miles apart, the events present a special opportunity for astronomers and casual stargazers to see multiple worlds in our solar system at one time. —Eric Lagatta, AZCentral.com, 6 Mar. 2026

Using the Very Large Telescope (VLT), astronomers have captured a stunning image of a glowing nebula in the Milky Way that resembles a vast cosmic hawk swooping down on its prey. —Robert Lea, Space.com, 6 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