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褐矮星

网络brown dwarf; Brown Dwarfs

褐矮星

褐矮星

褐矮星

brown dwarf

褐矮星（Brown dwarf）质量约为木星5~90倍之间。与一般恒星不同，褐矮星由质量不足，其核心并不会融合的氢原子来发光发 …

Brown Dwarfs

褐矮星(Brown dwarfs)是一种演化失败的恒星天体,其体积大于行星但要比恒星小很多。科学家们认为,褐矮星是由气体组成的球 …

1

A recently -discovered dwarf planet , named Sedna, has an extra-long and usual elliptical orbit around the Sun .

一颗近期被发现的褐矮星 “赛德娜 ”（Sedna ）有一个超长的椭圆形的绕太阳的轨道。

2

If red dwarfs can be compared to the red embers of a dying fire , then brown dwarfs would be the smoldering ash .

如果把红矮星比作一团熄灭的火焰的红色余烬的话，那么褐矮星就是闷烧灰烬。

3

These time differences alone were enough to confirm that these bodies are definitely planets , and not brown dwarfs or other stars.

这种时间间隔的差异，足以表明该星体绝对是行星，而不是褐矮星，或其它星体。

4

Cataloged as WISE 1828+2650 , it lies within 40 light-years of the Sun and is currently the coldest brown dwarf known .

这个星体被命名为 WISE1828+2650 ，位于距离我们太阳 40 光年的距离内，并且是迄今已知的最冷的褐矮星。

5

Brown dwarfs are also thought to be common , but there are only a few hundred known at this time because they are so difficult to see .

褐矮星也很常见，但由于它们太难以被观测，因此到目前为止已知的褐矮星只有寥寥几百。

6

They thought the star was probably of a type known as a brown dwarf and only had about . 05 the mass of Sirius B.

他们想该星或许是熟知的褐矮星的一个类型和质量只有天狼星 B 的 0 .

7

The star is a brown dwarf - and formed , like other stars, out of a cloud of dust and gas .

这颗恒星是褐矮星 ——像其他恒星一样，外部由尘埃和气体云构成。

10

This diagram shows a brown dwarf in relation to Earth, Jupiter, a low-mass star and the sun .

这张是褐矮星相对地球、木星、低质量恒星和太阳的对比图。

11

Over the years , we've pretty much ruled out all sorts of baryonic dark matter possibilities like brown dwarfs or black holes .

多年来，我们常常将存在各种重子暗物质（如：褐矮星或黑洞）的可能性排除在外。

12

Astronomers using WISE have spotted six Y -class brown dwarfs close to our sun -- within a distance of 40 light-years.

天文学家使用 WISE 已经找到了太阳系附近的 6 个 Y 型的褐矮星 ——都在 40 光年以内。

14

Remarkably , brown dwarfs are roughly the size of the planet Jupiter .

值得注意的是，褐矮星的大小却和木星相当。

15

The orbit of the brown dwarf is huge , about 2 , 500 times the distance between Earth and the sun .

这颗褐矮星的运行轨道相当庞大，大约是地球到太阳距离的 2500 倍。

16

Hundreds of possible brown dwarfs are out there awaiting confirmation .

成百上千个褐矮星仍等待着确认身份。

17

Brown dwarfs are the smallest and coolest of stars .

褐矮星是一种最小，最冷的恒星。

20

But the best news is that WISE has found a record-breaking Y-class dwarf .

而最好的消息则是，WISE 日前发现了一颗被标记为 Y 型的褐矮星。

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