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

So now, from the astronomer’s perspective, everything looks beautiful. — Quanta Magazine, 9 July 2026

For decades, astronomers have debated whether Earth's fate was tied to the sun's. — Sharmila Kuthunur, Space.com, 8 July 2026

See dinosaur bones at Flaming Cliffs, ride Mongolian horses across the steppe, stargaze with the on-property astronomer and stay in the luxurious Three Camel Lodge. — Roger Sands, Forbes.com, 8 July 2026

And this July, South Dakota hosts its second annual Badlands Astronomy Festival for scientists and amateur astronomers at Badlands National Park, which has a pending bid to become one of the state's International Dark Sky Parks. — Cnt Editors, Condé Nast Traveler, 7 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