So how long can a really low mass red dwarf last?

那么一颗真正低质量的红矮星能存活多久呢？

I say “might” explode, because it's at the lower mass limit for going supernova.

我说" 可能" 爆炸，是因为它处于超新星的质量下限。

The lower mass a star is, the longer it lives.

恒星的质量越低，它的寿命就越长。

It starts with the lowest mass stars, but as they leave even higher mass stars can be lost this way.

它从最小质量的恒星开始失去，但随着它们的离开，甚至质量更大的恒星也会以这种方式流失。

Very roughly speaking, we can divide stars into two groups: low mass stars and high mass stars.

非常粗略地说，我们可以把恒星分成两组：低质量恒星和高质量恒星。

Over time, these interactions tend to flick the lower mass stars out of the cluster completely, and the cluster loses stars.

随着时间的推移，这些相互作用往往会将较小质量的恒星完全甩出星团，从而使星团失去恒星。

In the lowest mass stars, cool red dwarfs, the rate is so slow they last a long, long time.

在低质量恒星，冷红矮星中，这个速率就非常慢，它们可以持续运作很长很长时间。

So if we place a relatively low mass object here, it will maintain a constant distance from the massive bodies pulling on it.

因此，如果我们在这里放置一个质量相对较小的物体，它将与吸引它的巨大天体保持恒定的距离。

Today you learned that massive stars fuse heavier elements in their cores than lower mass stars.

今天你学到了高质量恒星比低质量恒星在核心中融合更重的元素。

You might think massive stars would last longer because they have more fuel than lower mass stars.

你可能认为大质量恒星的寿命会更长，因为它们比低质量恒星有更多的燃料。

I became so intrigued by it I wound up studying low mass stars and brown dwarfs for several years after.

我对它非常感兴趣，在那之后的几年里，我开始研究小质量恒星和褐矮星。

What normal stars are left are low mass red stars, so globulars tend to look red.

剩下的正常恒星都是小质量的红色恒星，所以球状星团看起来都是红色的。

Today you learned that very low mass stars live a long time, fusing all their hydrogen into helium over a trillion years.

今天你学到了，低质量的恒星寿命很长，在一万亿年间，它们将所有的氢融合成氦。

In the last episode of Crash Course Astronomy, I talked about the eventual fate of the Sun, and other low mass stars like it.

在上一集天文学速成课中，我谈到了太阳和其他类似的低质量恒星的最终命运。

Asteroids look solid, but their low mass and weak gravity mean they're actually more like floating rubble heaps.

小行星看起来很坚固，但它们的低质量和弱引力意味着它们实际上更像是漂浮的碎石堆。

Things get very exciting at the high end, but for now, let's take a look at the low mass end of the scale.

高质量恒星的运作比较复杂，但现在，让我们先来看看低质量恒星。

More massive stars can squeeze their cores harder, so they fuse faster and get hotter than low mass stars.

质量更大的恒星会更猛烈地挤压它们的核心，因此它们融合得更快，比低质量恒星更热。

Stars with lower mass are cooler and redder, so they fall a little lower to the right, and so on.

质量较小的恒星温度较低，颜色也较红，因此它们会向右下降一点，以此类推。

But as these stars die and the fainter, lower mass stars take over, the galaxy will redden and dim.

但当这些恒星死亡，由更暗淡、更低质量的恒星接管时，星系将会变红、变暗。

It orbits a brown dwarf, a peculiar kind of low mass star that we'll learn more about in a future episode.

它绕着一颗褐矮星运行，这是一种特殊的低质量恒星，我们将在以后的章节中更详细地了解它。