After LC On Sunday, October 11, 2020 at 8:57:20 PM UTC-5 [email protected] wrote:
> > > On Sunday, October 11, 2020 at 8:07:33 AM UTC-6, Lawrence Crowell wrote: >> >> 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 >> > > *Does reheating occur before or after inflation? Is this the case for > every (hot) BB theory? AG* > -- 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/0d70bb57-53b3-4813-a1fb-263cb354a00dn%40googlegroups.com.
