Thanks Steve,
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While dark matter cannot be directly observed it's effects on stars can be detected as a deviation of the Keplerian orbits of the stars around the galactic centre.
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I agree here... i don't see any difference in both our posts.?.. There is "a" difference detected in these orbits. Dark Matter is one hypothesis. Interstellar Magnetism is another, i'm sure there are plenty of others. My point is... lets just be honest and not say "it IS dark matter", lets say "dark matter is one hypothesis".
Apart from that, we are on the same page with regard to "observations of dark matter" is one being inferred from newtonian g theory of the orbits you have mentioned.
As far as the other comments on scientific process with QFT, it's a slight connection there I guess, to be balanced we should announce how many hypotheticals failed... but i think we see the perspective there.
QFT is defining one possible hypothesis for Dark Matter Solution, i agree hypotheticals are made up to test. Wiki distinctly changed to "conjectured form of matter" recently, from hypothesised.... (just an interesting observation there).
My point is today we seem to be stacking hypotheticals up on each other, and declaring them as "it
is dark matter"... I read papers of many stacked up on each other... I sometimes wonder if these modelers ever open to door next to them and have a chat to other fields.
Thank you for the dark matter detectors reference. Pointing out the falsifiable nature of the theory important.
I have yet to see a stable gravity-only model of evolutional spiral formation, the EM lads have had them for 30+ years now, Gaensler from Syd Uni is now mapping the magnetism in fine detail, using faraday rotation, it would seem a verification worth noting to me.
Best,
Alex