Re: Galactic pancake mystery solved

Tim Killian <TJK@xxxxxxxxxxxxxxxxxx> wrote in
news:y5idnWNCVe0yacjfRVn-rQ@xxxxxxxxxxx:

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> Llanzlan Klazmon wrote:
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>> Tim Killian <TJK@xxxxxxxxxxxxxxxxxx> wrote in
>> news:_P2dndbSzZuXIcjfRVn-qw@xxxxxxxxxxx:
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>>>Yes, there's nothing like using a naive, first-order model in a
>>>computer simulation to to validate another unexplained and
>>>unobservable phenomenon.
>>>
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>> 1. How do you know the that the model they used was naive?
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> Because it's the first instance for use of the high-res N body model
> in this application. The authors admit that they assumed a
> distribution for the dark matter "halo", even though no such
> distribution has ever been measured! Yes, I'd call that naive.

I would call it the best avialable model at this stage. You should write
and tell them your concerns along with your suggested improvements.


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>> 2. The phenomenon they were attempting to model was certainly
>> observed. Otherwise why would they be attempting to explain it.
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> Yes, they know where the 11 satellite galaxies are located -- wow. I
> was referring to their "cold, dark matter" blather.
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>

I don't see a problem with that myself, as a working hypothesis to
explain the rotation curves of galaxies. If the hypothesis is wrong
these types of simulations can help to falsify it no?


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>>>Modern cosmology (in the guise of science) marches on -- LOL!
>>>
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>> What do you suggest they do? Give up and say this stuff can never be
>> understood?
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> No, but building your castle on a foundation of sand is never a good
> idea. Science should be about observation, repeatable experiments and
> fact, not video-game computer models, wishful thinking, or arm-waving
> explanations using untenable assumptions.
>

Well the obvious counter example to this argument is the neutrino. It
was required to balance the books in certain nuclear reactions. The dark
matter hypothesis is comparable. Sure it could be wrong but you have to
start from somewhere. Your comments about video game computer models are
absurd. Try telling Boeing they aren't allowed to use computer
simulations in their aircraft design program.

Klazmon.



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