Cosmologists don't know what dark energy is.

宇学家不知道暗能量是什么。

Hawking was also a cosmologist, a mathematician and an author.

霍金也是一位宇学家、数学家和作家。

And that lets cosmologists look back to the very dawn of the universe.

让宇学家回顾了宇的黎明时期。

For cosmologists, the expansion of the universe is not a problem.

对宇学家来说，宇膨胀不是问题。

Cosmologists are making sense of startling discoveries.

宇学家正在研究那些惊人的发现。

Cosmologists worked out that there must be some form of energy that keeps the universe from collapsing.

宇学家推论必定存在某种能量使宇免于坍缩。

But cosmologists take everything into account, by using careful measurements of the expansion rate.

但宇学家仔细测量了膨胀率，把一切都考虑在内。

Cosmologists have come up with a name, dark energy.

宇学家给它起了名字，暗能量。

Figuring out what dark energy is, is probably the number one goal of cosmologists today.

搞清楚暗能量是什么可能是宇学家现在排在首位的目标。

In this context, Boltzmann's paradox has found renewed interest by contemporary cosmologists.

在这种情况，兹曼悖论重新引起了当代宇学家的兴趣。

While a present-day cosmologist might describe the stabilising influence of our Earth's tilt.

而当今的宇学家可能会描述月球对地球倾斜的稳定起了很作用。

That may sound absurd, but it's kept several generations of top cosmologists up at night.

听起来可能有些奇怪，但是这让好几代顶级宇学家彻夜难眠。

David Schlegel is a cosmologist from the University of California at Berkeley.

卫·施莱格是一位宇学家，来自于伯克利的加州学分校。

And by comparison, the entire universe is very simple and even the cosmologists will admit that.

相比之，整个宇非常简单，甚至宇学家也会承认这一点。

For cosmologists, the road ahead has become a lot less certain.

对宇学家来说，前进道路上充满了太多的不确定因素。

But for cosmologists like Sean Carroll, that's not enough.

但对于肖恩·卡罗这样的宇学家来说，这还不够。

Anthony Aguirre, from the University of California in Santa Cruz, is a theoretical cosmologist.

安东尼·阿吉雷来自于圣克鲁斯的加利福尼亚学，是一位理论宇学家。

So as cosmologists what we do is we apply Einstein's theory of relativity to the universe as a whole.

作为宇学家，我们要做的就是把爱因斯坦的相对论应用到整个宇中。

Here, astronomers like Richard Ellis are working on a problem that has been all-consuming for cosmologists since Edwin Hubble.

理查艾利斯等天文学家在这里研究自从艾德温哈勃以来让宇学家费尽心思的问题。

But even without being able to see the universe in those first instants, cosmologists are pretty sure about a few things.

但是即使不能在最初的瞬间看到宇，宇学家也相当确定一些事情。