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褐矮星是“失败”的恒星。
Brown dwarfs are'failed stars.褐矮星是“失败”的恒星。
A brown dwarf is like 褐矮星是失败的恒星还是超级行星?
Brown Dwarfs: Failed Stars or Overachieving Planets?褐矮星是失败的恒星还是超级行星?
Are brown dwarfs failed stars or super-planets?褐矮星是失败的恒星还是超级行星?
Are Brown Dwarfs Planets or Failed Stars?褐矮星是失败的恒星还是超级行星?
Home Space& Planetary Are brown dwarfs failed stars or super-planets?褐矮星有时会被称为“不成功”的星体。
Brown dwarfs are sometimes referred to as"failed" stars.褐矮星在两到四分钟里会突然变成两倍亮。
Suddenly, the brown dwarf would get twice as bright for two to four minutes.因此褐矮星的质量应该拥为木星质量的10到60倍左右。
Therefore brown dwarfs should have 10 to about 60 times the mass of Jupiter.褐矮星的体积比恒星略小一些，但质量却大于巨行星。
Brown dwarfs are smaller than massive stars, but bigger than giant planets.这些被称作褐矮星的恒星，其质量只有太阳质量的1.2%至7%。
These objects, called brown dwarfs, measure between 1.2 and 7 percent of the Sun's mass.这是我们在恒星形成区寻找褐矮星的原因之一，例如RCW38。
This is one of the reasons we looked for brown dwarfs in a star forming region: the young cluster RCW 38.褐矮星另一个显著的特性是它们的半径大约都与木星的半径相同。
A remarkable property of brown dwarfs is that they are all roughly the same radius as Jupiter.褐矮星被国际天文学联合会(IAU)定义为小型恒星，但事实上它们是大型行星。
The brown dwarfs have been defined by the[IAU- International Astronomical Union] as small stars, but in fact, some of them are big planets.褐矮星被称为失败的恒星，无法维持为它们提供动力所需的氢聚变。
Brown dwarfs are known as failed stars that can't sustain the hydrogen fusion needed to power them.M1207b：为第一颗以直接摄影法发现的行星，也是首颗环绕褐矮星的行星。
M1207 b: The first planet found around a brown dwarf.褐矮星既冷且黑暗，在它们的有生之年稳定的步入黑暗：足够老的褐矮星将会为太暗，以至于侦测不到。
Brown dwarfs cool and darken steadily over their lifetimes: sufficiently old 褐矮星填补了恒星和小得多的行星之间的“空白”--这是两种截然不同的天体。
Brown dwarfs fill the“gap” between stars and the much smaller planets- two very different types of astronomical objects.褐矮星很难归类：它们太大而不能被称为行星，但又不够大到可被归为恒星。
Brown dwarfs, hard to categorise, are too huge to be classified as planets and not big enough to be classified as stars.褐矮星自20世纪60年代起就在理论上存在，并且在20世纪90年代首次被观察到。
Brown dwarfs have existed in theory since the 1960s and were observed for the first time in the 1990s.
