On 26 November 2014 at 22:05, <zibb...@gmail.com> wrote: > > On Tuesday, November 25, 2014 6:50:00 PM UTC, Liz R wrote: >> >> And I said that it seemed to me that if dark matter was being destroyed >> galaxies should be expanding, and asked if there was any observational >> evidence to support this. >> > > Liz, you said it right at the start...but the point is only valid one > time. What you reason above restates the same point in a different form. >
I repeated it because the other poster ignored what I'd said the first time AND made snarky comments showing he'd missed the point I was making, hence I felt it was worthwhile repeating it. Anyway, the point still holds. Dark matter is responsible for much of the structure of the universe, and if it's being turned into energy and radiated away then its gravitational attraction goes with it. Hence galaxies, held together by dark matter (as I Zwicky discovered in 1933 by studying their rotation curves) should be expanding IF dark matter is being annihilated, because the visible structure is rotating at the same speed around a centre containing a decreasing amount of mass. So, if I've understood this theory correctly, galaxies should be getting bigger. Can someone either explain how I've missed the point of the theory OR tell me if there is evidence of galaxies growing larger due to this effect? If not then I can happily forget this theory because it predicts some startling observational evidence that doesn't exist. -- 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 everything-list+unsubscr...@googlegroups.com. To post to this group, send email to everything-list@googlegroups.com. Visit this group at http://groups.google.com/group/everything-list. For more options, visit https://groups.google.com/d/optout.
