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Topic: Hubble and singularity
Replies: 5   Last Post: Aug 19, 2007 7:43 AM

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Ben Rudiak-Gould

Posts: 210
Registered: 2/2/05
Re: Hubble and singularity
Posted: Aug 18, 2007 11:26 AM
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Rupee wrote:
> According to Hubble's law, radius r of universe as a function of time
> t is:
>
> dr/dt= H r
>
> Integrating
> r=exp(Ht) +R or
> r=r0 exp(Ht)


Hubble's constant, despite its name, is also a function of time. It was much
larger in the past, and goes to infinity as you approach the big bang. It's
called a constant because it's been effectively constant for the whole of
human history.

-- Ben



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