" They're pretty sure that they're rocky planets."

“他们很确定它们是岩态行星。”

But on rocky planets like the Earth, it is rarely created accidentally.

但是像地球这样多岩石的星球就很难意外地产生。

For the first time, scientists have mapped the interior of another rocky planet.

科学家们第一次绘制了另一颗岩质行星的内部地图。

The Earth and other terrestrial, rocky planets are in a heat balance with the Sun.

地球和其他类地、岩石行星一样，与太阳处于热平衡状态。

In our nice familiar system, we've got a handful of petite rocky planets.

在我们熟悉的系统中，有几个小的类地行星。

Or is it one of the prize rocky planets that's mostly heavier, more dense material?

还是说它是一颗质量更重，密度更大的岩质行星？

Yet one of the Solar System's other rocky planets did get off to a good start.

然而，太阳系的其他岩石行星中的一颗确实有了一个良好的开端。

NASA said nearly 550 of the planets were “rocky planets, ” somewhat like Earth, based on their size.

NASA表示，根据大小，这些行星中有550颗都是“岩态行星”，就像地球一样。

This means the samples likely hold valuable data about the early development of rocky planets such as Earth.

这意味着这些样本可能含有有关地球等岩石行星早期发展的有价值的数据。

Because it's so hard to make on rocky planets like the Earth, it has almost no false positives for life.

因为它很难产生于地球这种多岩石的星球，它几乎不可能误报为有生命迹象。

Venus was geologically dead, making the Earth the only rocky planet with active volcanism.

金星在地质上已经死亡，使地球成为唯一具有活跃火山活动的岩石行星。

Rocky planets like Earth are born from the leftover material of a newly formed star.

像地球这样的岩石行星是从新形成的恒星的剩余物质中诞生的。

Water is found throughout the rocky planets where human beings would be interested in exploring.

在人类有兴趣探索的岩石行星上到处都能找到水。

There's also the potential for it being a rocky planet, just like ours.

就像我们的地球一样，它也有可能成为一颗岩石行星。

Researchers think they might have identified a rocky planet like ours that's relatively close by in the universe.

AZUZ：研究人员认为他们可能已经确定了一颗像我们这样的岩石行星，它在宇宙中相对较近。

A rocky planet this big could have a single colossal continent that would have huge deserts in its center.

这么大的岩石行星可能有一个巨大的大陆，其中心会有巨大的沙漠。

That means it probably has to be a gas giant like Jupiter rather than a rocky planet like Earth.

这意味着它可能必须是像木星这样的气态巨行星， 而不是像地球这样的岩石行星。

But it is one of the best rocky planets we have for measuring the composition of any atmosphere it may possess, he added.

他说，" 但这是我们发现的其中一个最佳岩质行星，使我们得以测量其可能存在的大气层的成分。"

Secondly, methane would not last for long in atmospheres of habitable rocky planets without constant replenishment, possibly by living organisms, the researchers said.

其次，研究人员表示，如果没有活的机体的持续补充，甲烷在可居住的岩质行星的大气层中不会存在很长时间。

The surface formed mostly in the last billion years, which makes it fresher and more recently active than any rocky planet other than Earth.

表面主要是在过去的十亿年形成的，这使得它的表面比除了地球之外的其他岩石星球都更加新，更加活跃。