On Sunday, October 11, 2020 at 5:42:53 AM UTC-5 [email protected] wrote: > > > On Sunday, October 11, 2020 at 4:25:04 AM UTC-6, Lawrence Crowell wrote: >> >> >> >> On Saturday, October 10, 2020 at 8:52:58 PM UTC-5 [email protected] >> wrote: >> >>> >>> >>> On Saturday, October 10, 2020 at 5:25:35 PM UTC-6, Lawrence Crowell >>> wrote: >>>> >>>> >>>> >>>> On Saturday, October 10, 2020 at 5:32:25 PM UTC-5 [email protected] >>>> wrote: >>>> >>>>> >>>>> >>>>> On Saturday, October 10, 2020 at 1:03:00 PM UTC-6, Lawrence Crowell >>>>> wrote: >>>>>> >>>>>> On Friday, October 9, 2020 at 12:27:00 PM UTC-5 [email protected] >>>>>> wrote: >>>>>> >>>>>>> >>>>>>> >>>>>>> On Friday, October 9, 2020 at 3:53:46 AM UTC-6, Lawrence Crowell >>>>>>> wrote: >>>>>>>> >>>>>>>> I read this yesterday. It so far appears there is no data to >>>>>>>> support information from a prior cosmic cycle. >>>>>>>> >>>>>>>> Penrose did ground breaking work on the nature of black holes and I >>>>>>>> think his crowning achievement in mathematical physics is twistor >>>>>>>> theory of >>>>>>>> the mid 70s. His CCC theory is a bit like Hoyle's steady state theory >>>>>>>> in >>>>>>>> that it is a sort of intended obstruction to a more successful theory >>>>>>>> that >>>>>>>> is gaining support. >>>>>>>> >>>>>>>> LC >>>>>>>> >>>>>>> >>>>>>> *Please clarify your last sentence above. What "more successful >>>>>>> theory" are you referring to; the hot BB with inflation? AG * >>>>>>> >>>>>> >>>>>> Primarily back then it was just BB. Now with inflation a much wider >>>>>> range of problems have been solved, and it is supported by CMB data. >>>>>> >>>>>> LC >>>>>> >>>>> >>>>> *Has anyone proposed a Cold BB, which seems illogical since one can >>>>> imagine an expanding universe backward in time; that is, contracting and >>>>> getting denser and hotter? AG * >>>>> >>>> >>>> As a rule the more a gas is compressed the hotter it gets. >>>> >>>> LC >>>> >>> >>> Of course. Does that mean a COLD BB has never been proposed because it >>> defies our understanding of how a contracting gas behaves? AG >>> >> >> Yes. >> >> LC >> > > *TY. Then it cools as it expands. But why do some, or is it all BB > theories, propose a "reheating" phase? How could it reheat if it is still > expanding? What's the need for reheating? AG * >
That involves the vacuum physics of inflation. It is analogous to a phase transition and the reheating might be compared to latent heat of fusion. LC -- You received this message because you are subscribed to the Google Groups "Everything List" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/everything-list/e206597d-9e5c-4721-a574-c2d139f55cf8n%40googlegroups.com.
