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黑暗宇宙

Dark Universe 101 | National Geographic

– [Instructor] The planets, moons, and stars make up less than 5% of all the mass in the universe.
行星 卫星和恒星 占宇宙质量的比例不到5%
The rest lies in the realm of absolute darkness.
其余的则处于绝对黑暗的状态
The dark universe is the invisible,
黑暗的宇宙是宇宙中看不见的
yet dominating, component of the cosmos.
但占主导地位的组成部分
It includes a substance called dark matter
它包括一种叫做暗物质的物质
and a force called dark energy.
和一种叫做暗能量的力量
While little is known about either, each helps us
虽然我们对他们两个都知之甚少
understand the universe beyond what the eye can see.
但它们都有助于 我们了解肉眼看不到的宇宙
Dark matter makes up about 25% of mass in the universe,
暗物质约占宇宙质量的25%
but its composition is still unknown.
但它的组成仍然未知
The substance neither emits nor reflects light
这种物质既不发光也不反光
and because of that, it cannot be seen.
恰巧正因如此他们才看不见
The existence of dark matter can be inferred
暗物质的存在可以根据
based on its gravitational pull on the visible universe.
它对可视宇宙的引力来判断
According to some scientists, this force is what prevents
根据一些科学家的说法 这种力量就是
stars within galaxies from drifting away.
阻止星系内恒星漂移的原因
Dark matter may have also played a role in the creation of the cosmos.
暗物质也可能在宇宙的形成中起了作用
After the Big Bang, dark matter formed a network
在宇宙大爆炸之后暗物质形成了
of filaments across the universe and, in this network,
一个遍布宇宙的细丝网络 在这个网络中
the first stars and galaxies were born.
诞生了第一批恒星和星系
Not much is known about dark matter,
对暗物质虽然了解不多
but even less is known about dark energy.
但对暗能量的了解更少
Dark energy is a mysterious force
暗能量是一种神秘的
that fills the space between objects.
充满了物体之间的空间的能量
It makes up about 70% of mass in the universe,
它占宇宙质量的70%左右
plus it has a repulsive property
而且暗能量具有能抵消重力的
that counteracts the force of gravity.
排斥特性
The reason for dark energy’s existence is unclear.
暗能量存在的原因尚不清楚
One theory states that it’s the fifth force of nature.
一种理论认为这是大自然的第五种力量
Yet another says it may help explain
另一个却说这可能有助于解释
why the universe is expanding.
宇宙膨胀的原因
In his Theory of General Relativity,
在阿尔伯特·爱因斯坦的广义相对论中
Albert Einstein considered a repulsive force, similar to
他考虑了一种类似于暗能量的排斥力
dark energy, that pushed space and particles apart.
这种排斥力将空间和粒子分开
Called the cosmological constant, the variable may provide
这个被称为宇宙学常数的变量可能为
clues for the expansion of space and time.
时空的膨胀现象提供线索
Much about the dark universe is left to be discovered.
关于黑暗宇宙的很多事情都有待发现
But with every theory and technological development,
但随着每一种理论和技术的发展
secrets of the invisible cosmos
人们会逐渐揭开
will come closer to being revealed.
不可视宇宙的秘密

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黑暗宇宙

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https://www.youtube.com/watch?v=9HNtHTZ2FpQ

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