这些夭折恒星(指棕矮星)的起源是个谜。
棕矮星是一种气体球，它们的质量仅是木星的几十倍。
Brown dwarfs are balls of gas whose mass is generally dozens of times that of Jupiter.
棕矮星是类恒星天体的一种，质量约为5至90个木星之间。
Brown dwarf star is a class of stellar objects as a mass of about 5-90 Jupiter.
棕矮星是一些由炽热的气体组成的球，它们缺乏像行星那样足够的质量来进行氢的燃烧。
Brown dwarfs are balls of warm gas that lack the mass necessary to fuse hydrogen at their core, as stars can.
两个转向的年轻恒星之间的近距离接触可能对构成银河系里像谜一样的棕矮星有所帮助。
Close encounters between swerving young stars might help spawn the brown dwarfs riddling the Milky Way.
在相同年龄的年轻星团里，带有气盘的棕矮星比率，确实与带有气盘的恒星比率相当。
Indeed, in a young cluster of a given age, the percentage of brown dwarfs with disks is comparable to the percentage of stars with disks.
虽然排斥说的确预言棕矮星的气盘应被截断，但被排斥逐出的矮星仍有可能保留著小型气盘。
Whereas the ejection scenario does predict that brown dwarf disks should be truncated, it is still possible for ejected dwarfs to retain a small disk.
同恒星相类似，棕矮星能够融化氢原子，但它们重量太轻，它们还不能把融化氢的过程持续下去。
Like stars, brown dwarfs are capable of fusing a rare form of hydrogen called deuterium, but they are too lightweight to burn ordinary hydrogen and quickly run out of fuel.
一种学派认为如果一颗系外行星的质量是木星的13倍还多，那它就是一颗棕矮星而不是一颗行星。
One school of thought says that if an exoplanet has a massmore than 13 times that of Jupiter, it is not a real planet, but rather a browndwarf.
他还说，既然在稠密的星簇里，近距离接触产生的机会比较高，由此我们可以期待着检测到更多的棕矮星。
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.
距最近一项研究发现，在距地球75光年的地方，隐藏着一颗棕矮星，它是迄今为止所发现的最冷最暗的星。
A brown dwarf found hiding 75 light-years from Earth is the coldest and dimmest ever discovered, a new study reports.
它比之前最冷最暗的棕矮星还要暗4 ~5倍，也就是比它低130度，它的表面温度大约100摄氏度，相当于一杯热茶的温度。
It's four to five times dimmer and 130 degrees cooler than previous record-holders, with a surface temperature of about 100 degrees Celsius - comparable to a cup of hot tea.
CFBDSIR J 1458 + 1013B可能是新型棕矮星的第一个证据，这种新型棕矮星被称为“Y谱”物，它们比其他任何一种棕矮星更像行星。
CFBDSIR J1458 + 1013b May be the first evidence of a new type of brown dwarf, called a "y spectral" object, that more closely resembles a planet than any other type of brown dwarf.
早期，一颗名叫CFBDSIRJ1458+1013B的更热更亮的伴星一直使这颗棕矮星不能被清楚地观测到，直到天文学家用更先进的望远镜分辨出它。
A warmer and brighter companion originally obscured the brown dwarf, named CFBDSIR J1458+1013B, until astronomers used telescopes powerful enough to discern it.
早期，一颗名叫CFBDSIRJ1458+1013B的更热更亮的伴星一直使这颗棕矮星不能被清楚地观测到，直到天文学家用更先进的望远镜分辨出它。
A warmer and brighter companion originally obscured the brown dwarf, named CFBDSIR J1458+1013B, until astronomers used telescopes powerful enough to discern it.
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