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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Other talks will dive into the nature of brown dwarfs, faint dwarf galaxies and the structure of the Milky Way's outskirts, highlighting how recent findings are reshaping long-standing theories.
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Samantha Mathewson, Space.com, 5 Jan. 2026
This uncertainty, called mass–distance degeneracy, meant that earlier detections could not rule out heavier objects such as brown dwarfs.
—Rupendra Brahambhatt, Interesting Engineering, 3 Jan. 2026
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Samantha Mathewson, Space.com, 5 Jan. 2026
This uncertainty, called mass–distance degeneracy, meant that earlier detections could not rule out heavier objects such as brown dwarfs.
—Rupendra Brahambhatt, Interesting Engineering, 3 Jan. 2026
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 11 Jan. 2026.
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