On 6/10/2025 9:54 PM, Alan Grayson wrote:
On Tuesday, June 10, 2025 at 9:27:11 PM UTC-6 Brent Meeker wrote:
On 6/10/2025 7:58 PM, Alan Grayson wrote:
On Saturday, June 7, 2025 at 6:28:41 AM UTC-6 John Clark wrote:
On Sat, Jun 7, 2025 at 8:05 AM Alan Grayson
<[email protected]> wrote:
*>> The James Webb telescope recently found a galaxy
that had a red shift of 14.44, from that number
astronomers calculate that it took light 13.5 billion
years to reach us, so we're observing how that galaxy
looked 13.5 billion years ago. However during that
13.5 billion years the universe has not only been
expanding it's been accelerating, so back then the
universe was expanding slower not faster than it is
now. Today that galaxy is not 13.5 billion light
years from us, it is 34.7 billion light years from
us. Even if we could travel at the speed of light we
could never reach that galaxy in a finite number of
years, and any galaxy that has a red shift greater
than 1.8 is forever out of our reach.*
/> You say we're observing how that galaxy looked 13.5
billion years ago,/
*Yes.*
/> but that the redshift being observed today, gives us
the recessional velocity today?/
*Not exactly.Velocityis about objects moving through space,
but the redshift tells us how much space itself has been
expanding.*
*The redshift gives us a combination of expansion of space and
the recessional velocity through space. *
*That's assumed to be zero.
*
*But since we're observing the galaxy as it was, about 10 billion
years ago, how can we deny that it's now receding at near light
speed if that's what our measurements plainly r**eveal? *
*No one denies that. The galaxy is further away now and receding
faster now and hence still obeying Hubble's law.
*
*How can it be receding near light speed NOW, if we're measuring the
red shift in the PAST? AG
*
*It's receding faster than light speed now. It's gone from the
observable universe.
Brent*
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