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
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The unprecedented observations of such bright, long radio bursts from this binary star system are just the beginning, astronomers say. Ashley Strickland, CNN, 14 Mar. 2025 Astronomers suggest that supermassive black holes create hypervelocity stars when binary stars (a pair of stars gravitationally bound to each other) get too close. Margherita Bassi, Smithsonian Magazine, 12 Mar. 2025 Hypervelocity stars are thought to be created when a binary star system gets too close to a supermassive black hole. Robert Lea, Space.com, 7 Mar. 2025 This nova is especially exciting because the white dwarf star on which it is found exists in a particularly unusual binary star system. Keith Cooper, Space.com, 20 Feb. 2025 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

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Cite this Entry

“Binary star.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/binary%20star. Accessed 30 Mar. 2025.

Kids Definition

binary star

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

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