According to the dominant cosmological model, the Lambda-CDM model, less than 5% of the universe's energy density is made up of the "matter" described by the Standard Model of Particle Physics, and the majority of the universe is composed of dark matter and dark energy-with little agreement amongst scientists about what these are made of.
If one extrapolates the Lambda-CDM model backward from the earliest well-understood state, it quickly (within a small fraction of a second) reaches a singularity called the "Big Bang singularity".
Standard model of Big Bang cosmology [edit] The ΛCDM (Lambda cold dark matter) or Lambda-CDM model is a parametrization of the Big Bang cosmological model in which the universe contains a cosmological constant, denoted by Lambda (Greek Λ), associated with dark energy, and cold dark matter (abbreviated CDM).
e The ΛCDM (Lambda cold dark matter) or Lambda-CDM model is a parametrization of the Big Bang cosmological model in which the universe contains a cosmological constant, denoted by Lambda (Greek Λ), associated with dark energy, and cold dark matter (abbreviated CDM). It is frequently referred to as the standard model of Big Bang cosmology because it is the simplest model that provides a reasonably good account of the following properties of the cosmos
一张表示宇宙间不同物质能量成分的饼图 ,大约有96%的能量来自奇异的暗物质 和暗能量 。 ΛCDM模型 (英语 :ΛCDM Model 或Lambda-CDM Model )是所谓Λ-冷暗物质 (Cold Dark Matter )模型 的简称。 它在大爆炸 宇宙学 中经常被称作索引模型,这是因为它尝试解释了对宇宙微波背景辐射 、宇宙大尺度结构 以及宇宙加速膨胀 的超新星观测。
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