19th June 16:17
Very Large Baseline Interferometry has also been used to determine the
earth's chandler wobble, nutations in the precession and microsecond
changes in the length of day.
It was the last of these, and the correlation with the El Nino- La
Nina cycle that I felt gave additional evidence to a siderial
While position accuracies for radio sources like quasars are not in
question, I would be interested in just how accurate angular
separations are WRT to the sun. If you come across any reference with
hard numbers I would appreciate a link.
I have no doubt that the CMB is non local, but I had read that the
effective surface temperature of galaxies was 2.7K and the CMB could
be a reflection of this. Its just that with the redshift of galaxies,
the farther its source the cooler its temperature. There is also an
IR background, with the same anisotropy, and I'm not sure that there
is a suitable explanation for it.