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
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Subtle irregularities in how the brown dwarfs moved hinted that something unseen was tugging on them—something in an unusual orbit. Thomas G. Moukawsher, MSNBC Newsweek, 17 Apr. 2025 This means one of the brown dwarfs eclipses the other, as seen from our vantage point on Earth. Robert Lea, Space.com, 16 Apr. 2025 Scientists think one possibility is that the auroras are driven by an orbiting planet or moon interacting with the brown dwarf’s intense magnetic field. Jake Parks, Discover Magazine, 24 Mar. 2025 The brown dwarf is unlikely to be habitable, as it was found to be about 400 degrees Fahrenheit or 200 degrees Celsius. Hannah Hudnall, USA TODAY, 10 May 2024 See All Example Sentences for brown dwarf

Word History

First Known Use

1975, in the meaning defined above

Time Traveler
The first known use of brown dwarf was in 1975

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Cite this Entry

“Brown dwarf.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/brown%20dwarf. Accessed 27 Apr. 2025.

Kids Definition

brown dwarf

noun
: an object in space that is much smaller and dimmer than a normal star
Last Updated: - Updated example sentences
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