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

Unfortunately for meteor viewers, the bright full moon could actually interfere with meteor shower viewing, astronomers said. —Doyle Rice, USA Today, 5 Aug. 2025

Galaxy Formation: Galactic Jellyfish Earlier in June, astronomers unveiled their discovery of a galaxy resembling a bunny-eared jellyfish, bobbing through the currents of the Universe. —Katie Liu, Discover Magazine, 31 July 2025

However, what astronomers saw contradicted one of the prevailing models of GRB energy emissions. —Andrew Paul, Popular Science, 30 July 2025

The Pope’s astronomer Rebecca Mead on the intersection of faith and science. —Ian Crouch, New Yorker, 28 July 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