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Nebular then and Now
Has to be a good theory that 13 billion years ago the first stars were
just about supernova. The greater density of the nebular would account for that. These clouds had great hydrogen density,but no dust. Next phase came stars from a less dense nebular but still with as mass of about 3 suns,and their fusion was triggered faster because of the shock waves created by supernovas. Now supernovas leave a blackhole,and these blackholes would create lumpy space where stars would form around them. These exploding supernova would create the building blocks for planets,and life. Phase 4 is the time of medium size stars(suns) They came to be 5 billion years ago.They came from thinned out hydrogen,and dust clouds . These are the stars that are just right for life because they can last 10 billion years(average) Phase 6 time is "now" it is the time of low mass stars we call "red dwarfs" they are very dim,but last a very long time. In the universe there are billions,and billions more gas planets than stars. Phase 7 that is just about ready to arrive will be a time of gas planets,and the building blocks of rock planets was just about over in phase 5 It all came out of times of mass density created by gravity,and the number and type of atoms gravity had to work with. Bert PS Left out a lot,but for me this is a lot of typing |
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