red dwarf


Definition of red dwarf

: a star having substantially lower surface temperature, intrinsic luminosity, mass, and size than the sun

Examples of red dwarf in a Sentence

Recent Examples on the Web The researchers determined that the Ross 128 system, the second-closest system that includes an Earth-size exoplanet orbiting a red dwarf star 11 light-years away, might have seen Earth transit the sun for 2,158 years. Ashley Strickland, CNN, 23 June 2021 Scientists were in the midst of examining the nearby star for 40 hours when the red dwarf belched out a flare that was one of the most violent ever seen in a solitary star. Elizabeth Howell, Forbes, 26 Apr. 2021 The closest star on Kaltenegger’s list is the red dwarf star Wolf 359, which is 7.9 light-years away. Fox News, 24 June 2021 One star known as Ross 128, with a red dwarf host star located in the Virgo constellation, is about 11 light-years away and is the second-closest system with an Earth-size exoplanet. Gabriela Miranda, USA TODAY, 24 June 2021 The closest star on Kaltenegger’s list is the red dwarf star Wolf 359, which is 7.9 light-years away., 23 June 2021 The closest star on Kaltenegger's list is the red dwarf star Wolf 359, which is 7.9 light-years away. Seth Borenstein, Star Tribune, 23 June 2021 In the case of a sub-Neptune planet orbiting a small, cool red dwarf star, the planet casts a large shadow when passing in front of its star, from our perspective. Mike Wehner, BGR, 9 June 2021 Proxima Centauri is only about an eighth the mass of our Sun, a red dwarf star of a kind that are normally small and dim. Jamie Carter, Forbes, 4 May 2021

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'red dwarf.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of red dwarf

1926, in the meaning defined above

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Time Traveler for red dwarf

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The first known use of red dwarf was in 1926

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Dictionary Entries Near red dwarf

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red earth

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Statistics for red dwarf

Last Updated

12 Jul 2021

Cite this Entry

“Red dwarf.” Dictionary, Merriam-Webster, Accessed 26 Jul. 2021.

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