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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

The calculation was created in the 1800s by a Belgian astronomer, and then a doctor in the U.S. renamed it the body mass index in the 1970s.

From MarketWatch • Mar. 18, 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

The astronomer also said the star identified was slightly smaller than one scientists would "nominally expect to turn into a black hole."

From Barron's • Feb. 12, 2026

Asked what was the purpose of life, he replied, “the investigation of the Sun, the Moon, and the heavens,” the reply of a true astronomer.

From "Cosmos" by Carl Sagan

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.