On 7/19/2025 11:07 AM, Alan Grayson wrote:
On Saturday, July 19, 2025 at 5:17:32 AM UTC-6 John Clark wrote:
On Fri, Jul 18, 2025 at 8:18 PM Alan Grayson <[email protected]>
wrote:
> /the red shift increases, implying increasing recessional
velocity./
*The above statement is the source of your confusion. You cannot
conclude that if there is a redshift then there must be a
recessional velocitybecause the movement of something through
space is just one way to produce a redshift, there are two other
ways that it can happen:*
You previously agreed that although there could be more than one cause
of red shift, with one exception it always indicates recessional
velocity from the pov of the observer measuring that red shift. The
exception is gravitational red shift. AG
Forget about the gravitational red shift. It is relatively small.
Similarly, forget about "something moving thru space". That is also
negligible for distant galaxies. Just concentrate on understanding the
"expansion of space", the Hubble expansion part, first.
Brent
*1) The space between the Earth and very distant objects could be
expanding. *
*2) The light may have to fight its way out of a strong
gravitational field. But we know that can't be a major factor in
forming the redshift we see from very distant galaxies because,
from gravitational lensing, we can determine that the
gravitational field around those galaxies is not nearly strong
enough to produce such a massive redshift. *
***John K Clark See what's on my new list at Extropolis
<https://groups.google.com/g/extropolis>*
{(%
--
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/2d0848ce-b96e-4616-8402-bf3fe6c5b2edn%40googlegroups.com
<https://groups.google.com/d/msgid/everything-list/2d0848ce-b96e-4616-8402-bf3fe6c5b2edn%40googlegroups.com?utm_medium=email&utm_source=footer>.
--
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/a4cd0804-ea73-4932-9826-71b7b135c3cc%40gmail.com.
