On Monday, January 13, 2020 at 6:24:00 AM UTC-7, John Clark wrote: > > On Mon, Jan 13, 2020 at 8:13 AM Alan Grayson <[email protected] > <javascript:>> wrote: > > *> the winking out is purely a geometric effect of the expansion.* > > > I have no idea what you mean by that but if something is beyond your > observable horizon then nothing you do can have any effect on it and > nothing it does can have any effect on you. > > John K Clark >
*Suppose you're sitting at the origin of a one-dimension space. A line 100 meters long will increase 1 meter per unit time if the rate of expansion is 1% per unit time. If the line is a 1000 meters long, the end point moves away 10 meters per unit time, and so forth. So if the line is long enough, the length will eventually increase more than 300,000 km, for any rate of expansion per unit time. 300,000 km is the distance light travels in one second. Thus, the end point will eventually increase in distance more than can be overcome by light traveling at c. This is what I mean by a purely geometric effect. Brent showed me this awhile back, and it was an A-HA moment! Winking out of distant galaxies does NOT depend on the rate of expansion; only that it continues. 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/ab49e98d-f99e-40eb-9c35-b1506fecefdb%40googlegroups.com.
