brown dwarf

基本解释

Brown dwarfs are balls of gas whose mass is generally dozens of times that of Jupiter.
棕矮星是一種氣躰球，它們的質量僅是木星的幾十倍。
Brown dwarfs are balls of warm gas that lack the mass necessary to fuse hydrogen at their core, as stars can.
棕矮星是一些由熾熱的氣躰組成的球，它們缺乏像行星那樣足夠的質量來進行氫的燃燒。
Since there is a higher chance of such close encounters in dense star clusters, we might expect to detect more brown dwarfs there, he says.
他還說，既然在稠密的星簇裡，近距離接觸産生的機會比較高，由此我們可以期待著檢測到更多的棕矮星。

MACHOs could well be white dwarfs--overturning a common belief that the dark matter would consist mainly of lighter interstellar garbage such as brown dwarfs.
ECONOMIST: The dark side of cosmology
The first kind, the chunks, could be anything in size from dust grains, up through rocks and asteroids, to brown dwarfs (condensed lumps of gas not quite heavy enough to be stars).
ECONOMIST: The dark side of cosmology
The problem is that brown dwarfs have been discovered orbiting other stars, and it is thought that planets can sometimes be ejected from their natal solar systems as a result of gravitational interactions, and may thus be found drifting in space.
ECONOMIST: Twinkle, twinkle, giant planet