> From: Dan Minette <[EMAIL PROTECTED]> > > From: "Doug Pensinger" <[EMAIL PROTECTED]> > > > Dan wrote: > > > > > Second, he misses the sociology of science completely. If he were to > > > make the more limited claim that states that "there increased number of > > > anomalies that have to be explained in an ad hoc manner indicates that > > > there may be serious limitations to our present theory", then he'd have > a > > > very strong case. > > > > OK, I know I'm way out of my league when discussing this stuff with you, > > but if the above is true, why spend any time at all trying the patch the > > theory up with fantastic ideas like inflation and dark matter? > > Or Planck's constant, or the Bohr theory of the atom? Inflation is > certainly not an elegant theory....but it is at least a decent > phenomenological model of the very very early universe. It is a way of > expressing the parameters. > > Dark matter is used to explain the rotation of the galaxies. If one does > General Relativity (which I think can be well approximated by good old > Newtonian gravitation for the cases we are considering), we find that the > rotation of the stars in the galaxies do not match the mass of the observed > stars. If there were dark matter, then the rotation would be consistent > with what we know about gravity. If not, then we have to find a fudge for > gravity....one we have no real basis for. Of the two, dark matter was > considered a bit more conservative.
<<http://xxx.lanl.gov/abs/astro-ph/0507619>> General Relativity Resolves Galactic Rotation Without Exotic Dark Matter Abstract: A galaxy is modeled as a stationary axially symmetric pressure-free fluid in general relativity. For the weak gravitational fields under consideration, the field equations and the equations of motion ultimately lead to one linear and one nonlinear equation relating the angular velocity to the fluid density. It is shown that the rotation curves for the Milky Way, NGC 3031, NGC 3198 and NGC 7331 are consistent with the mass density distributions of the visible matter concentrated in flattened disks. Thus the need for a massive halo of exotic dark matter is removed. For these galaxies we determine the mass density for the luminous threshold as 10^{-21.75} kg.m$^{-3}. _______________________________________________ http://www.mccmedia.com/mailman/listinfo/brin-l
