# Thread: Size of the universe vs. c

1. ## Size of the universe vs. c

Hi there. Newbie to this forum here.

This is a question that's been bugging me for ages. I gather that
measurements of the microwave background radiation indicate that the
universe is at least 60-80 billion light years across. But the big bang
theory tells us that the universe started from a point just 13-14
billion years old.

Given that the speed of light is the limit, how has the universe managed
to get to its current size in the time available? I'm imagining two
particles which started off very shortly after the initial singularity
and headed in opposite directions at nearly c for the entire lifetime of
the universe; how could they currently be more than 13-14 billion light
years apart?

2. ## Size of the universe vs. c

Oops - on second thoughts, relative to us, the two particles could be
26-28 billion light years apart. But the question remains...

3. ## Size of the universe vs. c

"timbo" <no.replies@here.com> wrote in message
news:4ojrc.20\$c74.16@newsfe1-gui.server.ntli.net...

c is the limit for things moving in space. Space itself does
not suffer this restriction, so distant regions of space can
be separating at speeds greater than c, carrying their
material contents (and immaterial ones too) along with them
for the ride.

It is thought that in the first moments of the Big Bang, during
what is known as the Inflation Era, the universe expanded at
rates much, much higher than c.

4. ## Size of the universe vs. c

On Fri, 21 May 2004 08:48:28 +0100, timbo wrote:

The expansion of the universe is not matter moving. It's space expanding.
No known speed limit on that.

--
- Mike

Remove 'spambegone.net' and reverse to send e-mail.

5. ## Size of the universe vs. c

"Mike Ruskai" <spamten.knilhtrae@begonedynnaht.net> wrote in message
is the edge defined?

6. ## Size of the universe vs. c

>But presumably there is something at the edge,matter or >energy, how else

I'm tempted ...

ok I give up ... you do Jane!

"JANET" <mail@eftalou.freeserve.co.uk> wrote in message news:c983qd\$fg5\$1@news7.svr.pol.co.uk...

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