On Friday, January 31, 2020 at 6:34:32 PM UTC-6, Alan Grayson wrote: > > > > On Friday, January 31, 2020 at 5:05:32 PM UTC-7, Lawrence Crowell wrote: >> >> On Friday, January 31, 2020 at 12:37:41 PM UTC-6, Alan Grayson wrote: >>> >>> >>> >>> On Friday, January 31, 2020 at 11:23:49 AM UTC-7, Lawrence Crowell wrote: >>>> >>>> This simultaneity is the Hubble frame. >>>> >>>> LC >>>> >>> >>> No Wiki article on the "Hubble frame" and no definition that I can find >>> on Internet. What exactly is it? TIA, AG >>> >> >> It is a frame where this gravitational redshift of CMB or equivalently a >> time dilation of quantum oscillations that emitted this radiation is >> homogeneous. >> >> LC >> > > Wouldn't that be everywhere at rest wrt the CMB? AG >
But of course that is the case, where here rest just means isotropic distribution of the CMB radiation. There are small deviations from local motion. This however, does mean there is radial motion of galaxies and ultimately the last ionized surface of scatter away, and this motion away is the same for all observers. 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/5385a58c-d71f-4603-b043-ea5b2d141fb4%40googlegroups.com.
