brown dwarf

(redirected from Brown dwarf star)
Also found in: Encyclopedia.
Related to Brown dwarf star: red dwarf star

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 ?
This journey concludes with the view of a brown dwarf star, known as a "cold star.
It is so massive that it is debated whether it still is a planet (it would be a Jupiter-class gas giant) or whether it should actually be classified as a brown dwarf star.
For this film, one of the things that caught my eye was putting a brown dwarf star in the sky, which is like a very big Jupiter.
The villain is a rogue brown dwarf star projected to distantly cross the plane of our solar system in 2009 and then again in 2012 but closely enough to fundamentally disrupt natural processes.
The question was whether this is a planet or a brown dwarf star.
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.