brown dwarf


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Related to brown dwarf: white dwarf

brown dwarf

n.
A celestial body that is more massive than a gas giant planet but has insufficient mass to sustain the hydrogen fusion reactions that produce radiant energy in normal stars.

brown dwarf

n
(Astronomy) a type of celestial body midway in mass between a large planet and a small star

brown′ dwarf′


n.
a cold, dark star that is too small to initiate the nuclear reactions that generate heat and light.

brown dwarf

(broun)
A celestial body that is similar to a star but does not emit light because it does not have enough mass to ignite internal nuclear fusion. See Note at dwarf star.
Translations
ruskea kääpiö
barna törpe
brun dverg
brun dvärg
References in periodicals archive ?
Today, the coolest known starlike orb is a brown dwarf discovered last year.
ISLAMABAD -- Astronomers have discovered the first aurora outside our solar system, around a brown dwarf about 18 light years away from Earth and up to 10,000 times more powerful than any previously seen.
A brown dwarf, or "failed star", is an object more massive than a planet yet too small to trigger the thermonuclear reactions that power stars.
Exoplanets are the distant offspring of a star beyond our sun, a brown dwarf, or a stellar corpse.
But scientists estimate it is probably a brown dwarf rather than a planet since brown dwarfs are known to be fairly common.
The newfound coldest brown dwarf is named WISE J085510.
Spitzer's infrared observations helped determine the frosty temperature of the brown dwarf.
They peered out into space at a brown dwarf named ISO-Oph 102.
Solar system planetary scientists, brown dwarf and exoplanet observers and theoreticians, molecular spectroscopists, and instrument specialists discuss methods and findings in the composition of atmospheres around planets beyond the solar system.
Dubbed CFBDSIR 1458 10b, the brown dwarf has a remarkably low surface temperature of 97 degrees C (206 degrees F) - just about as hot as a freshly made morning cup of coffee.
Alan Boss, an exoplanet expert at the Carnegie Institution of Washington, and Lisa Kaltenegger, a Harvard exoplanet hunter, both said more study was needed to confirm the new set of photos were those of proven planets and not just brown dwarf stars.
Scattered among the galaxy are brown dwarf stars, capable of producing energy to heat colonizing stations and power starships.