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

Just a decade ago, few people had heard of Odd Radio Circles, while discoveries involving rogue planets, brown dwarfs, and other unusual objects continue to reshape scientists’ understanding of how the Universe works. — Kaif Shaikh, Interesting Engineering, 6 Aug. 2026

Such are the strange semantic questions raised by studies of CD-35 2722 B, a brown dwarf with about 30 times the mass of Jupiter that’s orbiting a small star that is some 73 light-years from Earth in the system CD-35 2722. — Adam Kovac, Scientific American, 22 July 2026

Instead Hoy and his colleagues used the radial velocity method to look for wobbles in the brown dwarf. — Jeffrey Kluger, Time, 22 July 2026

Orbiting this star is a brown dwarf, which is a type of gas giant that is larger than a planet, yet smaller than a star. — Andrew Paul, Popular Science, 22 July 2026

Word History

First Known Use

1975, in the meaning defined above

Rhymes for brown dwarf

• morph
• orf
• wharf
• polymorph

Kids Definition

brown dwarf

noun

: an object in space that is much smaller and dimmer than a normal star