binary star

noun

: a system of two stars that revolve around each other under their mutual gravitation

Examples of binary star in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
The discovery means that Betelgeuse is a binary star system. Robin George Andrews, New York Times, 22 July 2025 Strange things start to happen as the Enterprise follows the Gorn closer to a binary star system. Keith Phipps, Vulture, 17 July 2025 That is the highest level of polarization ever seen from such a binary star system. Robert Lea, Space.com, 16 July 2025 The researchers believe the binary star system will merge soon. Julia Jacobo, ABC News, 17 Dec. 2024 See All Example Sentences for binary star

Word History

First Known Use

1826, in the meaning defined above

Time Traveler
The first known use of binary star was in 1826

Browse Nearby Words

Cite this Entry

“Binary star.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/binary%20star. Accessed 25 Jul. 2025.

Kids Definition

binary star

noun
: a system of two stars that revolve around each other under the gravitation of both

More from Merriam-Webster on binary star

Last Updated: - Updated example sentences
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!