On 9 May 2014 13:03, John Ross <[email protected]> wrote: > My understanding is that current scientific thinking has our Universe > expanding to 40 % of its current size in a very short time period. This > sounds like something was traveling faster than the speed of light. My > book contains a good explanation for the inflation period. How do you > explain it? > > > General relativity is quite happy for space-time *itself* to expand faster than light, however (like special relativity) it forbids any FTL motion *within* space-time. Inflation is a period during which space-time contains worldlines which diverge at speeds that observers on those worldlines would consider FTL (this creates an event horizon between them).
If dark energy continues to push our universe apart as it appears to be doing now, this will eventually lead to the components of the universe (galaxies etc) moving away from each other FTL, due to the space containing them moving FTL - even though none of the them have changed their velocities within space-time. Positing that particles can move FTL locally is different from suggesting that distant regions of the universe can separate at FTL speeds. So anyway, what is your reasoning? What premises and logical steps led you to think the world is built in the way described by your theory? -- 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 http://groups.google.com/group/everything-list. For more options, visit https://groups.google.com/d/optout.
