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Epoch Of Reionisation
In the fields of Big Bang theory and physical cosmology, cosmology, reionization is the process that caused matter in the universe to reionize after the lapse of the "Timeline of the Big Bang#Dark Ages, dark ages". Reionization is the second of two major phase transitions of gas in the universe (the first is recombination (cosmology), recombination). While the majority of baryon#Baryonic matter, baryonic matter in the universe is in the form of hydrogen and helium, reionization usually refers strictly to the reionization of hydrogen, the element. It is believed that the Big Bang nucleosynthesis, primordial helium also experienced the same phase of reionization changes, but at different points in the history of the universe. This is usually referred to as helium reionization. Background The first phase change of hydrogen in the universe was recombination (cosmology), recombination, which occurred at a redshift ''z'' = 1089 (379,000 years after the Big Bang), due to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Big Bang
The Big Bang event is a physical theory that describes how the universe expanded from an initial state of high density and temperature. Various cosmological models of the Big Bang explain the evolution of the observable universe from the earliest known periods through its subsequent large-scale form. These models offer a comprehensive explanation for a broad range of observed phenomena, including the abundance of light elements, the cosmic microwave background (CMB) radiation, and large-scale structure. The overall uniformity of the Universe, known as the flatness problem, is explained through cosmic inflation: a sudden and very rapid expansion of space during the earliest moments. However, physics currently lacks a widely accepted theory of quantum gravity that can successfully model the earliest conditions of the Big Bang. Crucially, these models are compatible with the Hubble–Lemaître law—the observation that the farther away a galaxy is, the faster it is mo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
