brown dwarf
noun Date: 1978 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

New Collegiate Dictionary. 2001.

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  • Brown dwarf — Brown dwarfs are sub stellar objects which are too low in mass to sustain hydrogen 1 fusion reactions in their cores, which is characteristic of stars on the main sequence. Brown dwarfs have fully convective surfaces and interiors, with no… …   Wikipedia

  • brown dwarf — brown′ dwarf′ n. astron. a cold, dark star that is too small to initiate the nuclear reactions that generate heat and light …   From formal English to slang

  • brown dwarf — n. a hypothetical celestial object consisting of a body of gas that gives off a small amount of radiation but lacks sufficient mass to initiate the nuclear fusion that characterizes true stars …   English World dictionary

  • brown dwarf — Astron. a cold, dark star that is too small to initiate the nuclear reactions that generate heat and light. * * * Astronomical object intermediate in mass between a planet and a star. Sometimes described as failed stars, brown dwarfs are believed …   Universalium

  • brown dwarf — /braʊn ˈdwɔf/ (say brown dwawf) noun an astronomical body which is not of sufficient mass and temperature to produce hydrogen fusion and become a star: *Astronomers found weather similar to that on Jupiter in the atmospheres of brown dwarfs –… …   Australian English dictionary

  • brown dwarf — noun A star that is typically about the volume of the planet Jupiter, which has mass approaching that of a star, but insufficient to ignite its elements and cause it to burn as a true star, except that of deuterium …   Wiktionary

  • brown dwarf — noun Astronomy a celestial object which is intermediate in size between a giant planet and a small star, believed to emit mainly infrared radiation …   English new terms dictionary

  • Brown Dwarf —    Bodies that are much larger than planets, but are too small to carry out continuous nuclear fusion in their cores, so they can t become stars …   The writer's dictionary of science fiction, fantasy, horror and mythology

  • brown dwarf — noun : a celestial object that is much smaller than a normal star and has insufficient mass for nuclear fusion to begin but that is hot enough to radiate energy especially at infrared wavelengths …   Useful english dictionary

  • Brown-dwarf desert — A brown dwarf desert is an orbital distance around a star at which brown dwarfs cannot exist as binary stars. [cite book | title = Planet Formation: Theory, Observations, and Experiments | author = Hubert Klahr and Wolfgang Brandner | publisher …   Wikipedia

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