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Oct 29, 2016 at 4:25 vote accept Saujatya Kole
Oct 29, 2016 at 4:27
Oct 29, 2016 at 4:00 comment added anna v @SaujatyaKole From the original Big Bang source, as the expansion cooled the universe there were regions where during the inflation period the seeds of galaxies , high density regions, had much higher kinetic energies than what became finally the void between clusters of galaxies and galaxies. Also gravitational attraction and accumulation of matter raises kinetic energies , when a cloud of matter condenses into a star like the sun, for example, changing potential energy (from original BB ) to kinetic.
Oct 27, 2016 at 18:02 comment added Bill N +1 for mentioning tunneling! Extremely important phenomenon.
Oct 27, 2016 at 17:54 comment added Saujatya Kole From where do they gain such high kinetic energy??
Oct 27, 2016 at 17:29 history answered freecharly CC BY-SA 3.0