星云(国外英文资料).doc

星云(国外英文资料) The cosmic Nebula edit entry has been concerned with the catalog 1 origin of the universe 2 galaxy formation 3 star formation The life course of 4 stars 5 the formation and evolution of life 6 the end of the universe Expand directory 1 origin of the universe 2 galaxy formation 3 star formation The life course of 4 stars 5 the formation and evolution of life 6 the end of the universe 7 emission nebula 8 reflecting Nebula 9 planetary nebula 10 related information 1 11 difficult to understand 12 discover history Edit and edit this episode of cosmic origin The first source of cosmic origin is a singular point, the so-called cosmic egg, which condenses all temporal and spatial qualities, breeds all the future of the material world, including celestial bodies and life. About 15 billion years ago, the eggs in an incomparable big bang sudden. The big bang shook out time and space, and the world of material broke out, and the epoch of cosmic history began. Just the birth of the universe, space from scratch and sharp surge, only 10-32 seconds, then inflation to about 1 light-years in diameter. At one second, as the big explosion produced a strong energetic body that evenly filled the entire space, the universe became a melting pot of 10 billion K high temperature, and all the material was boiled into a pot of basic particles soup. Then, a violent primitive cosmic storm began, and a violent collision occurred between the basic particles, which melted into protons and formed helium nuclei. The process continued for about three minutes until all neutrons were depleted. About 22% mass matter is polymerized into helium nuclei, and the rest are almost non aggregated protons, i.e., hydrogen nuclei, and only one hundred thousand of them belong to isotopes helium 3 and deuterium, and tens of billions of them belong to lithium. Primitive nebula formation. Edit this section of galaxy formation The original material to build the primitive universe (mainly about 78% hydrogen an