On Sunday, December 23, 2018, Brent Meeker <[email protected]> wrote:
> > > On 12/22/2018 4:29 PM, Jason Resch wrote: > > > > On Fri, Dec 21, 2018 at 10:01 PM Brent Meeker <[email protected]> > wrote: > >> >> >> On 12/21/2018 5:43 PM, Jason Resch wrote: >> >> >> >> On Fri, Dec 21, 2018 at 12:46 PM Brent Meeker <[email protected]> >> wrote: >> >>> >>> >>> On 12/20/2018 9:09 PM, Jason Resch wrote: >>> > I am not advocating any global reference frame, just mentioning that >>> > for a particular observe, they can define a present that works for >>> > them (in their own reference frame). From their point of view they can >>> > consider themselves at rest (whether they are or are not). >>> >>> They can define it in words, but can they define it physically. >>> >>> >> What is wrong with using the 3-d hyperspace perpendicular to their >> direction through spacetime? >> >> >> That's words. How shall they determine whether event X in distant galaxy >> Y is simultaneous with their clock reading Z? Is their "direction through >> spacetime" constant over billions of years? >> > > If the event occurred N-light years away, and light from that event > arrives in N-years, then it can be considered simultaneous with the > observer. > > > You mean it could have been considered simultaneous if the observer had > known it at the time and the observer had not changed motion in the > intervening years. > > > If their direction through spacetime changes, they must change their > interpretation of what constitutes the present. > > > So as I get up and walk to the garage, whole galaxies of events switch > from my past to my future. What is the physical significance of this? > > > Brent > Nothing, beyond showing we exist in a 4d spacetime with no objective present (a block time). Jason -- 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 post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/everything-list. For more options, visit https://groups.google.com/d/optout.
