On 12/27/2017 1:22 PM, agrayson2...@gmail.com wrote:
On Wednesday, December 27, 2017 at 8:57:46 PM UTC, Brent wrote:
Even as the universe expands there will still be a part of it
which was close enough to us (in the distant past) that it is
still within our visible universe.
Brent
CMIIAW, but our galaxy formed a long time AFTER the time of
recombination,
But if you look at a spacetime diagram of the evolution of the universe
(c.f. Ned Wright's UCLA tutorial online) it's obvious that there is a
piece of the CMB that was at the same place as the place our galaxy
formed, using stationarity of the CMB as the reference frame.
Brent
so it's not obvious why the CMB doesn't wink out like the distant
galaxies which are not in our vicinity, like Andromeda. AG
On 12/27/2017 12:17 PM, agrays...@gmail.com <javascript:> wrote:
Since galaxies were formed after the CMB came into existence
about 380,000 years after the BB, and those far away will wink
out as they cross the cosmic horizon, why doesn't the CMB also
wink out? I know the latter is reddening as the cosmos expands,
and is ubiquitous, but when the question was posed to me last
night at a meeting in Pasadena with former JPL colleagues, I
didn't have a good answer. TIA, 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 everything-li...@googlegroups.com <javascript:>.
To post to this group, send email to everyth...@googlegroups.com
<javascript:>.
Visit this group at
https://groups.google.com/group/everything-list
<https://groups.google.com/group/everything-list>.
For more options, visit https://groups.google.com/d/optout
<https://groups.google.com/d/optout>.
--
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 everything-list+unsubscr...@googlegroups.com
<mailto:everything-list+unsubscr...@googlegroups.com>.
To post to this group, send email to everything-list@googlegroups.com
<mailto:everything-list@googlegroups.com>.
Visit this group at https://groups.google.com/group/everything-list.
For more options, visit https://groups.google.com/d/optout.
--
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 everything-list+unsubscr...@googlegroups.com.
To post to this group, send email to everything-list@googlegroups.com.
Visit this group at https://groups.google.com/group/everything-list.
For more options, visit https://groups.google.com/d/optout.
