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
Some theories say brown dwarf pairs were seeded from the materials that surround a forming star.
—
Paul Smaglik, Discover Magazine, 16 Oct. 2024
Among these hundreds of millions of tiny specks of light lurk newborn stars, extremely cold brown dwarfs that only glow at infrared wavelengths, free-floating planets, and globular clusters—groupings containing millions of the Milky Way’s oldest stars in existence.
—Andrew Paul, Popular Science, 26 Sep. 2024
While some brown dwarfs may form stable planetary systems in their own right, astronomers have observed rogue brown dwarfs – objects that are free floating in space.
—Conor Feehly, Discover Magazine, 20 Sep. 2024
Matthews says that both the brown dwarfs likely formed from the same material, and at the same time, as Eps Ind Ab and its parent star.
—Tom Hawking, Popular Science, 24 July 2024
See all Example Sentences for brown dwarf 
These examples are automatically compiled from online sources to
illustrate current usage. Opinions expressed in the examples do not represent those of
Merriam-Webster or its editors.
Send us feedback
about these examples.
Paul Smaglik, Discover Magazine, 16 Oct. 2024
Among these hundreds of millions of tiny specks of light lurk newborn stars, extremely cold brown dwarfs that only glow at infrared wavelengths, free-floating planets, and globular clusters—groupings containing millions of the Milky Way’s oldest stars in existence.
—Andrew Paul, Popular Science, 26 Sep. 2024
While some brown dwarfs may form stable planetary systems in their own right, astronomers have observed rogue brown dwarfs – objects that are free floating in space.
—Conor Feehly, Discover Magazine, 20 Sep. 2024
Matthews says that both the brown dwarfs likely formed from the same material, and at the same time, as Eps Ind Ab and its parent star.
—Tom Hawking, Popular Science, 24 July 2024
See all Example Sentences for brown dwarf
Dictionary Entries Near brown dwarf
Cite this Entry
“Brown dwarf.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/brown%20dwarf. Accessed 5 Nov. 2024.
Copy CitationLove words? Need even more definitions?
Merriam-Webster unabridged
Share