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Synonyms

astronomer

American  
[uh-stron-uh-mer] / əˈstrɒn ə mər /

noun

  1. an expert in astronomy; a scientific observer of the celestial bodies.

Etymology

Origin of astronomer

First recorded in 1325–75; Middle English; astronomy, -er 1

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

A museum has been given a grant to fund a project about a Bradford-born astronomer who was influenced by the work of medieval Islamic scientists.

From BBC • Apr. 1, 2026

"It's very exciting to see our simulations matched so closely by data from another galaxy," said Lars Hernquist, Mallinckrodt Professor of Astrophysics at Harvard and a CfA astronomer.

From Science Daily • Mar. 23, 2026

The author documents Tennyson’s reaction to books by the geologist Charles Lyell, the computer pioneer Charles Babbage and the astronomer John Herschel.

From The Wall Street Journal • Feb. 20, 2026

Overall, SpaceX has 9,451 satellites currently in low-Earth orbit, or LEO, according to Jonathan McDowell, an astronomer who tracks space launches on his website.

From MarketWatch • Jan. 12, 2026

He was the son of well-known astronomer William Herschel, who earlier had proposed that Mars could support intelligent life.

From "Spooked!" by Gail Jarrow

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.