我们只能根据它对宇宙膨胀所起的作用来认识到它的存在。
We only know it exists because of its effect on the expansion of the Universe.
早期的宇宙还没有膨胀的那样厉害，它非常非常地拥挤。
The early universe, having not yet expanded much, was incredibly crowded.
如果膨胀速度持续加快，那么宇宙将会终结于冰川。
If the expansion will continue to speed up the Universe will end in ice.
暗能量是一种神秘的力量，它加速了宇宙的膨胀。
Dark energy is a mysterious force that speeds up the expansion of the Universe.
宇宙在膨胀。
这种情况发生的机制和宇宙膨胀的方式相关。
The mechanism that makes this happen is related to the way the Universe is expanding.
天文学家们知道宇宙正在膨胀这个事实已经有一段时间。
Astronomers have known for some time that the universe is expanding.
这种形式的物质在宇宙学尺度上也是无关紧要的，对膨胀或坍缩几乎没有贡献。
This form of matter also has no cosmologically significant pressure.
基本的架构是解释宇宙膨胀的标准大霹雳理论。
The basic framework is the standard big bang theory for the expansion of the universe.
此刻宇宙正像气球一般膨胀。
宇宙膨胀的故事，它是怎么证明是错的！
The story of the expanding universe and how it was shown to be wrong!
你知道为什么宇宙膨胀吗？
天文学家认为，宇宙从太初以来就不断膨胀。
Astronomers believe that the universe has been expanding ever since the beginning of time.
或者，膨胀可能是宇宙冷融合的一个结果。
暗能量是一种神秘的与万有引力相反的排斥力，它使宇宙膨胀。
Dark energy is a mysterious repulsive force that opposes gravity, causing the universe to expand.
根据这一观点，宇宙仍然在膨胀，因为现在这个宇宙生来就是膨胀的。
The universe is still expanding, according to this view, because it was born expanding.
你不知道的是当宇宙再度膨胀。
What you don't know is that when the universe expands again.
你不知道的是当宇宙再度膨胀。
What you don't know is that when the universe expands again.
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