From: Reason (reason@exratio.com)
Date: Sun Jan 13 2002 - 05:40:14 MST
--> Eugene Leitl
>On Sun, 13 Jan 2002, Damien Broderick wrote:
>
>> This might be old stuff to Robert, but has anyone run off a detailed
range
>> of possibilities for how such a history might affect the observable
cosmos?
>> Assuming that life couldn't emerge until, say, five billion years ago,
but
>> gets statistically more likely with each gigayear since (and hence
>> proximity to YOU ARE HERE <= ), can we chart corrections to luminosity
>
>If you're looking far, you're looking into an older universe. I think
>there's delayed hatching due to insufficient metal abundances in the young
>universe.
That would have to be way further than we see now. The initial
pre-population II population(s) of stars and subsequent mixing of the
interstellar medium only lasted n*10^7 years, according to current
modelling. That's pretty much an eyeblink -- you can safely assume that
galactic and larger scale structures start out at pop II metallicities. I
don't see that pop II is too little metal for life and civilization.
Reason
http://www.exratio.com/
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