On Monday, March 10, 2025 at 11:15:07 PM UTC-6 Brent Meeker wrote:
On 3/9/2025 11:14 PM, Alan Grayson wrote: I don't think you understand my question. Without a CC, or equivalently setting it to zero, don't we get a universe which is in UNSTABLE equilibrium, like balancing a pencil of its writing tip, so the universe expands or contracts in a very short time interval? Isn't this the issue Einstein faced? If so, why would he choose a positive CC? AG No, Einstein's model with the CC=0 was static. The model when I was in grad school was an expanding universe with the CC=0 but the expansion kinetic energy was just balanced by the negative gravitational potential, so the universe would expand forever but slowing asymptotically toward static. Brent Now I am totally confused. If E's model was static with CC=0, it agreed with what astronomers thought in 1915, so why would he add a positive CC, tantamount to a repulsive force as you earlier claimed, to counteract what he then thought was a false prediction of GR of an expanding universe? Does anyone have a coherent answer to what's going on with the CC? 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 visit https://groups.google.com/d/msgid/everything-list/a012aae4-1174-46c6-998c-c08aaca0e952n%40googlegroups.com.
