On Monday, September 16, 2024 at 11:47:56 AM UTC-6 John Clark wrote:
On Mon, Sep 16, 2024 at 10:40 AM Alan Grayson <[email protected]> wrote: *>> It has taken light from a star (or more likely from the CMB) 13.8 billion years to reach us but during those 13.8 billion years the star has not remained stationary relative to us, it has been accelerating away. In fact telescopic observation tells us that 9 billion years ago, when Dark Energy became more dominant than Dark Matter (plus regular matter), the acceleration has been accelerating. This *MIGHT* be because as the universe expands Dark Matter (plus regular matter) becomes more dilute but Dark Energy does not become diluted because it is an intrinsic part of space itself, so the more space you have the more Dark Energy you have.* *> If an object is receding for 13.8 BY, and the universe is expanding during that time, doesn't that imply a recession velocity faster than c, for the object to be on our observational horizon of 46 BLY? AG * *Yes and that is a clear violation of Special Relativity, however that was not Einstein's last word on the subject, that came 10 years later with General Relativity. Einstein still says matter, energy and information cannot travel through space faster than light, BUT space itself is free to expand at any speed, including much faster than light.* But when we approach the observable event horizon, the spatial expansion is still increasing less than c, so I don't see how the observational event horizon is 46 BLY. AG *l* -- 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/5a8d9cdc-49d0-431d-8a10-b951cbf16982n%40googlegroups.com.
