Re: Dark matter/energy - is it real?


"Erik Max Francis" <max@xxxxxxxxxxx> wrote in message
news:D4CdnX8oId33PK_ZRVn-ug@xxxxxxxxxxxxxxxx

But "stars 6x heavier than we think they are" isn't part of the model,

Actually it is. 6x the mass we know about is supposedly dark matter.
According to theory it interacts gravitationally just like anything else.

But dark matter theories don't say that the hidden mass is concentrated
_in stars_. It says that it's in that pesky halo that you bemoaned.


There's no reason for dark matter not to be closely associated with stars,
everything else affected by gravity is.




At this point you're trying so desperately hard to never admit that you're
wrong under any circumstances that you're saying utterly ridiculous
things.



Ah, ad himonems...

I'll take that as a concession.




Observation isn't consistent with the mass shadowing regular matter, we'd
just think regular matter was 6x denser. It isn't distributed in a halo
around stars, or a cloud encompassing stars, the planets don't orbit
right for that.

Sure it does. Do you know anything about halo dynamics at all?


Nope, but I don't have to. I know the models of planetary motion can be
closely approximated by assuming mass is concentrated at a point. We nailed
down that theory and planetary movement centuries ago. With mass
concentrated at a point, objects orbiting that point will have to maintain
certain speeds in relation to their distance to be in obit. If you have
significant dark matter clouds it will appear to objects further from the
Sun that they are orbiting a greater mass due to the mass in the intervening
space, and map of how orbital velocity falls off with distance would be
different than the one we have. Same for a halo.

No halo. No cloud. QED.




.

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