Someone whose nested quoting has overflowed my mental stack suggested:
b) The Earth rotates through 360 degrees in a solar
day, not a sidereal day as astronomers think,
therefore the concept of right ascension as a
means of documenting the location of stars is
flawed.

There are a lot of flaws with this suggestion, but one instructive
one is that the difference between the solar and siderial day is
around 1/365 = 1/3 of a percent.

In contrast, a quick look at
http://www.phys.canterbury.ac.nz/res...er/index.shtml
shows real-time measurements of the Earth's spin rate (via large
ring laser gyroscopes and the Sagnac effect) which are accurate down
to the the parts-per-billion level.

--
-- "Jonathan Thornburg -- remove -animal to reply"
Max-Planck-Institut fuer Gravitationsphysik (Albert-Einstein-Institut),
Golm, Germany, "Old Europe" http://www.aei.mpg.de/~jthorn/home.html
"Washing one's hands of the conflict between the powerful and the
powerless means to side with the powerful, not to be neutral."
-- quote by Freire / poster by Oxfam