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
Recent Examples on the Web
Examples can be seen as small red patches all across this view of Chamaeleon I.
The most recent census of Chamaeleon I, by Penn State University astronomer Kevin Luhman in 2017, found about 50 new stars and brown dwarfs, bringing the total population of Chamaeleon I up to 226 members.
—
Keith Cooper, Space.com, 16 June 2025
The new brown dwarfs also exhibit signals from an unidentified hydrocarbon, a chemical compound composed solely of hydrogen and carbon atoms.
—Robert Lea, Space.com, 12 June 2025
However, in this case, there are two brown dwarfs involved here.
—Andrew Paul, Popular Science, 16 Apr. 2025
Evidence for a polar circumbinary exoplanet orbiting a pair of eclipsing brown dwarfs.
—Thomas G. Moukawsher, MSNBC Newsweek, 17 Apr. 2025
See All Example Sentences for brown dwarf
Examples are automatically compiled from online sources to
show current usage.
Read More
Opinions expressed in the examples do not represent those of Merriam-Webster or its editors.
Send us feedback.
Keith Cooper, Space.com, 16 June 2025
The new brown dwarfs also exhibit signals from an unidentified hydrocarbon, a chemical compound composed solely of hydrogen and carbon atoms.
—Robert Lea, Space.com, 12 June 2025
However, in this case, there are two brown dwarfs involved here.
—Andrew Paul, Popular Science, 16 Apr. 2025
Evidence for a polar circumbinary exoplanet orbiting a pair of eclipsing brown dwarfs.
—Thomas G. Moukawsher, MSNBC Newsweek, 17 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 21 Jul. 2025.
Copy CitationLove words? Need even more definitions?
Merriam-Webster unabridged
Share