Gliese 581 D and E are the planets I wanna focus on now.
Gliese 581 D和E是我现在想集中讲的行星。
See, in 2009, a group of researchers made an announcement: these two exoplanets, Gliese 581 D and e do have some earth-like qualities.
在2009年，一群研究人员发布通告称这两个外星星球，Gliese 581 D和E确实有一些类地特质。
Gliese 581 D had actually been discovered a couple of years earlier.
Gliese 581 D实际上是早几年发现的。
And when its orbit was originally calculated it was thought to be too far away from its host star to be warm enough to support a liquid ocean, let alone carbon-based life.
But then its orbit was recalculated and now we see that Gliese 581 D is within its host’s habitable zone.
但是稍后他们重新计算了它的轨道，而我们现在可以看到Gliese 581 D位于它的寄主星的适居带之内。
Student: So it might have an ocean?
Professor: Well, conceivably. See, Gliese 581 D weighs 7 times what Earth weighs and it’s unlikely that it’s made entirely of rocks because it’s so massive.
教授：猜测是这样。你看，Gliese 581 D比地球重7倍，不太可能完全都是由岩石组成的，因为它体积太大了。
The researchers studying it said that it could have a rocky core, an ice layer, a large deep ocean and an atmosphere.