astronomer

[uh-stron-uh-mer]

noun

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

Word History and Origins

Origin of astronomer¹

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

Example Sentences

Since then, astronomers have used ground-based and space telescopes to monitor its progress and discover more about it.

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When astronomers use telescopes to look at galaxies in space, they find some that are close by and further away—that is, some younger and some very much older.

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Yet astronomers have made a groundbreaking discovery: For the first time, an international team of researchers, detected hot gas, revealing a supermassive black hole from almost 13 billion years ago.

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In 1916, astronomer E. E. Barnard discovered a star so interesting that astronomers have been studying it for over a century.

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This strange new world orbits around two stars at once, which dance around each other in what astronomers call a binary system.

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Related Words

• astrophysicist www.thesaurus.com
• cosmologist www.thesaurus.com