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 abbr. modified Newtonian dynamics
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It should be noted that NonRelativistic MOND is all well and good, but without the attempt to combine it with General Relativity, or another relativistic scheme, is it a severely limited picture (and not very useful in addressing dark matter “observations” involving gravitational lensing, etc.).
Experiments in NonRelativistic Modified Newtonian Dynamics (MOND)

Indeed, the argument that MOND is right at some deep level, even if it is merely a classical statistical summary of another law, is that it make predictions about galaxy rotation and apparent dark matter densities that neither dark matter theory or any other theory, did in advance of those observations.
Experiments in NonRelativistic Modified Newtonian Dynamics (MOND)

MOND is only significant where is close to the order of, just like Special Relativity takes over from Newton when nears the speed of light.
Experiments in NonRelativistic Modified Newtonian Dynamics (MOND)

However, if MOND is correct, the device should feel an aberrant kick.
Experiments in NonRelativistic Modified Newtonian Dynamics (MOND)

MOND is attractive because it doesn’t require any beyond the standard model particles.
Experiments in NonRelativistic Modified Newtonian Dynamics (MOND)

In many ways, MOND is an application of Occam’s razor to astronomy.
Experiments in NonRelativistic Modified Newtonian Dynamics (MOND)

I am a bit agnostic about these things, but these theories give so called MOND gravitational theories which supposedly account for dark matter.

AFAIU the observations of the Bullet and other clusters can't be predicted by alternatives such as MOND, for the reason that parameters differ for each case.

For an example of a real copouts consider the various "MOND" proposals: in order to account for the rotation curves of galaxies, you change Newtonian gravity at the right length scale.

Neither MOND nor dark matter is either ‘right’ or ‘wrong’ at this point, despite personal feelings for the logical ‘soundness’ of either proposal.
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