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red giant
noun
: a star that has low surface temperature and a diameter that is large relative to the sun
Examples of red giant in a Sentence
Recent Examples on the Web
The nova, also referred to as a thermonuclear explosion, occurs when enough material from the red giant builds up in the white dwarf to power a bright outburst.
—Alexa Robles-Gil, Smithsonian Magazine, 7 Oct. 2024
That appears to be what happened some 4000 light-years away, allowing a planet similar in mass and orbital position to slide twice as far from its star, surviving the star’s expansion into a red giant and subsequent contraction into a white dwarf.
—Christie Wilcox, science.org, 30 Sep. 2024
The red giant and white dwarf have an explosive relationship.
—Amanda Kooser, Forbes, 17 Oct. 2024
The hunter’s moon is expected to be joined by Jupiter, a red giant star called Aldebaran and the star cluster Pleiades, according to EarthSky.
—Gina Park and Ashley Strickland, CNN, 16 Oct. 2024
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Word History
First Known Use
1929, in the meaning defined above
Dictionary Entries Near red giant
Cite this Entry
“Red giant.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/red%20giant. Accessed 15 Nov. 2024.
Kids Definition
red giant
noun
: a very large star with a relatively low surface temperature
More from Merriam-Webster on red giant
Thesaurus: All synonyms and antonyms for red giant
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