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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
The discovery, which relied on data from the European Southern Observatory’s Very Large Telescope, marks the first time that a binary star system has been observed in the vicinity of a supermassive black hole, according to a press release.
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Eric Lagatta, USA TODAY, 18 Dec. 2024
However, the existence of a white dwarf is not sufficient for a Type la supernova; the white draft must also be part of a binary star system, in which a pair of stars orbit a common center of mass.
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Julian Dossett, Space.com, 15 Jan. 2025
New York has no issue in that regard — second in offensive rating, third in shooting percentage and a binary star averaging more than 50 points per game.
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Steven Louis Goldstein, The Athletic, 15 Jan. 2025
In mid-December 2024, scientists discovered a pair of binary stars designated D9 orbiting each other close to Sagittarius A* (Sgr A*), the supermassive black hole at the heart of the Milky Way.
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Robert Lea, Space.com, 30 Dec. 2024
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Word History
First Known Use
1826, in the meaning defined above
Dictionary Entries Near binary star
Cite this Entry
“Binary star.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/binary%20star. Accessed 20 Feb. 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
Thesaurus: All synonyms and antonyms for binary star
Britannica.com: Encyclopedia article about binary star
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