然而在大爆炸宇宙模型和恒星演化理论之间存在一个人们了解甚少的领域：就是由大量恒星组成而又作为宇宙基本单元的星系是如何形成和演化的?。
Between the theories of big-bang cosmology and the theory of stellar structure and theory, there is a gap still rarely understood: how do the galaxies form?
宇宙包含我们所知的所有空间和时间，所以要求用大爆炸模型解释我们视界之外的宇宙超出了这个模型的限定范围。
The universe encompasses all of space and time we know, so it is beyond the realm of the Big Bang model to postulate what the universe beyond our horizon is.
在这个大爆炸模型里有一系列的自由参数必须由我们的对宇宙观测数据来确定。
There are a number of free parameters in this family of Big Bang models that must be fixed by observations of our universe.
根据大爆炸模型，宇宙构成中，常规物质(原子)只占4%，暗物质占22%，暗能量占74%。
According to the big bang model, our universe is made up of around 4% of normal (atomic) matter; 22% dark matter and 74% dark energy.
但即便这一圆环结构最后被证实果真是大爆炸之前的遗迹，循环宇宙的想法可能也未必是最完美的模型解释。
But even if the circles really do stem from sources in a pre-Big Bang era, cyclic cosmology may not offer the best explanation for them.
宇宙学中的大爆炸模型可以追溯到20世纪初的两个核心思想：广义相对论和宇宙学原理。
The Big Bang model of cosmology rests on two key ideas that date back to the early 20th century: General Relativity and the Cosmological Principle.
当时，对宇宙的起源有两个主要的对立理论：宇宙大爆炸理论，稳态宇宙模型。
Back then, there were two major rival theories about the origin of the Universe: the Big Bang theory and the Steady-State model of the Universe.
这个模型模拟的是自宇宙大爆炸后5千万年——第一个星系形成的时候，并且计算出了137亿年间数以10亿计WIMP的相互作用。
Their simulation starts about 50m years after the Big Bang, when the first galaxies formed, and calculates the interactions of a billion WIMPs over the intervening 13.7 billion years.
大爆炸模型认为，现在的一切，包括曾经在一个近乎无限密度的单点集中的宇宙。
The Big Bang model holds that everything that now comprises the universe was once concentrated in a single point of near-infinite density.
假定真空有两种激发，并与大爆炸学说相结合得到了正负能物质对称宇宙模型。
Supposing there are two kinds of vaccum excitation and applying the theory of big-bang, we get a symmetry cosmic model which is of positive and negative energy matter.
假定真空有两种激发，并与大爆炸学说相结合得到了正负能物质对称宇宙模型。
Supposing there are two kinds of vaccum excitation and applying the theory of big-bang, we get a symmetry cosmic model which is of positive and negative energy matter.
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