Re: Most Distant Galaxy - What's wrong with this statement?

Posted by Owen Densmore on Oct 25, 2013; 3:41pm
URL: http://friam.383.s1.nabble.com/Most-Distant-Galaxy-What-s-wrong-with-this-statement-tp7584094p7584106.html

Just to check: the expansion of the early universe does not take part in this issue, right?  It occurred both very early and before the release of photons (around 300My after big bang?).  But it did massively change the "size" of the universe.

   -- Owen

On Thu, Oct 24, 2013 at 10:12 PM, Roger Critchlow <[hidden email]> wrote:

http://en.wikipedia.org/wiki/Metric_expansion_of_space:

"Because of the changing rate of expansion, it is also possible for a distance to exceed the value calculated by multiplying the speed of light by the age of the universe. These details are a frequent source of confusion among amateurs and even professional physicists."

-- rec --

On Thu, Oct 24, 2013 at 10:08 PM, Robert J. Cordingley <[hidden email]> wrote:

Regardless of the poetic 'outer edges' is it possible what might be meant is in the context of a hyperspherical universe where the radius is time and is 13.5 by?  The center being when the big bang occurred.  Then the furthest object would be diametrically opposite and hypercircumferentially at 13.5*pi bly or 42.4 bly away?  So in the 'now' being at 30bly away is chicken feed.

Robert C.

On 10/24/13 9:20 PM, Roger Critchlow wrote:

Where is "the outer edge of the Universe" and what sort of observation would locate something there?  All that the original report in Nature established was redshift (7.51), age (700 Myr after the Big Bang), and a surprising rate of star formation (330 solar masses / year).

-- rec --

> > >  From the BBC at http://www.bbc.co.uk/news/science-environment-24637890
> > > (today)
> > >
> > > /Because it takes light so long to travel from the outer edge of the
> > > Universe to us, the galaxy appears as it was 13.1 billion years ago (its
> > > distance from Earth of 30 billion light-years is because the Universe is
> > > expanding)./

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