brown dwarf
noun
: a celestial object that is much smaller than a normal star and has insufficient mass to sustain nuclear fusion but that is hot enough to radiate energy especially at infrared wavelengths
Examples of brown dwarf in a Sentence
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Emitting little to no visible light, the pair of brown dwarfs Bab is around 1,000 times fainter than their parent binary red dwarfs and can only be observed in infrared.
—
Robert Lea, Space.com, 22 Aug. 2025
The first brown dwarfs were only found in the 1990s.
—Phil Plait, Scientific American, 12 June 2025
Evidence for a polar circumbinary exoplanet orbiting a pair of eclipsing brown dwarfs.
—Thomas G. Moukawsher, MSNBC Newsweek, 17 Apr. 2025
However, in this case, there are two brown dwarfs involved here.
—Andrew Paul, Popular Science, 16 Apr. 2025
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Robert Lea, Space.com, 22 Aug. 2025
The first brown dwarfs were only found in the 1990s.
—Phil Plait, Scientific American, 12 June 2025
Evidence for a polar circumbinary exoplanet orbiting a pair of eclipsing brown dwarfs.
—Thomas G. Moukawsher, MSNBC Newsweek, 17 Apr. 2025
However, in this case, there are two brown dwarfs involved here.
—Andrew Paul, Popular Science, 16 Apr. 2025
See All Example Sentences for brown dwarf
Cite this Entry
“Brown dwarf.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/brown%20dwarf. Accessed 10 Sep. 2025.
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