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
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Another possibility is that the presence of phosphine is somehow related to the intrinsic chemical composition of the brown dwarf.
—
Keith Cooper, Space.com, 7 Oct. 2025
Analyzing a ‘failed star’ Astronomers don’t fully understand how brown dwarfs are formed.
—Chris Young, Interesting Engineering, 1 Oct. 2025
The first brown dwarfs were only found in the 1990s.
—Phil Plait, Scientific American, 12 June 2025
However, in this case, there are two brown dwarfs involved here.
—Andrew Paul, Popular Science, 16 Apr. 2025
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Keith Cooper, Space.com, 7 Oct. 2025
Analyzing a ‘failed star’ Astronomers don’t fully understand how brown dwarfs are formed.
—Chris Young, Interesting Engineering, 1 Oct. 2025
The first brown dwarfs were only found in the 1990s.
—Phil Plait, Scientific American, 12 June 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 19 Oct. 2025.
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