We only know it exists because of its effect on the expansion of the Universe.

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。

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Dark energy is a mysterious force that speeds up the expansion of the Universe.

暗能量是一种神秘的力量，它加速了宇宙的膨胀。

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If dark energy does exist, then it ultimately causes the expansion of the Universe to accelerate.

如果说暗物质真的存在，那将最终导致宇宙膨胀速度的加快。

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Dark energy is a hypothetical form of energy that is causing the expansion of the universe.

FORBES: NASA Joins ESA Hunt For Dark Energy And Matter

Dark energy, a mysterious force thought to drive the expansion of the universe, trails at 12 to 1.

ECONOMIST: The LHC is now operating in earnest

Redshift is a measure of the degree to which light has been "stretched" by the expansion of the Universe.

BBC: Observatory detects record burst