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

Glimpsing many in the sky at once is a fun way to connect with astronomers of centuries past, said planetary scientist Emily Elizondo with Michigan State University. —Adithi Ramakrishnan, Los Angeles Times, 24 Feb. 2026

Before Cassini’s mission, astronomers believed that gravitational disturbances inflicted by neighbor Neptune’s orbit caused Saturn’s tilt over time. —Jacopo Prisco, CNN Money, 23 Feb. 2026

Best cheap drones frequently asked questions The most frequently asked questions on the best cheap drones under $500 answered by our contributing expert, astronomer James Abbott. —James Abbott, Space.com, 23 Feb. 2026

Glimpsing many in the sky at once is a fun way to connect with astronomers of centuries' past, said planetary scientist Emily Elizondo with Michigan State University. —ABC News, 23 Feb. 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