Re: Triple AES (3AES) - OT: Universe Accelerating Expansion and Recent Cosmological Discoveries
From: Phil Carmody (thefatphil_demunge_at_yahoo.co.uk)
Date: 05/23/03
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Date: Fri, 23 May 2003 23:41:58 +0300
On Fri, 23 May 2003 10:45:45 +0000, John A. Malley wrote:
> John E. Hadstate wrote:
>
>> "John M. Dlugosz" <john@dlugosz.com> wrote in message
>> news:968f09a.0305230659.49711ab8@posting.google.com...
>>
>>
>>>The Universe isn't going to implode; it will keep expanding at an
>>>accelerating rate until it's essentially empty.
>>>
>>>
>>
>> The scope of useless things one can learn on sci.crypt is utterly amazing!
>> And how did you come by this esoteric bit of enlightenment?
>
>
> Just a nit: this _is_ recent cosmology. The universe's expansion appears
> to be accelerating, or supernova as standard "candles" used to measure
> distance to galaxies reflect physics unknown to us at this time.
>
> The brightness curve verses time for a type 1A (IIRC) supernova appears
> to be invariant in the Universe. Astronomers compare the apparent
> brightness of supernovae in our own galaxy whose distance from us got
> established with other means (like parallax, for instance.)
>
> This gives a distance to the remote galaxy.
>
> The galaxy also has a red shift. The apparent red-shift can be
> calibrated to distance using the apparent brightness of supernovae in
> it. This allows for the determination of the Hubble constant.
>
> If I understand correctly, recent measurements of type 1A supernovae in
> very remote galaxies (as implied by their red shift) are dimmer than
> expected, implying they are farther away then the red shift indicates as
> calibrated by nearby galaxy measurements.
It's late and I'm tired. However, I interpret that to imply that if they're
furhter away than their speed would predict, then they're slower than their
distance would predict. i.e. they aren't as fast any more. i.e they're
slowing down.
> This means the expansion of the Universe accelerated, or supernova
> physics changes with the age of the Universe, or (Devils Advocate here),
> Frederick Hoyle and others are on the right track with their QSSC model
> and measured red shift of some objects may have an intrinsic as well as
> expansion term contribution. It's still being sorted out.
>
> For more detailed information, google on "quintessence" or "dark energy".
Quintessence? I have the book, IIRC (in a different country alas, so I can't
re-read).
Phil
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