On 3/10/2025 11:04 PM, Alan Grayson wrote:
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,
Sorry, I miswrote. I intended to say Einstein had to make the CC>0 in
order to balance the gravitational attraction.
Brent
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
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