"Paul B. Andersen" wrote in message ...
On 07.06.2013 02:04, Koobee Wublee wrote:
On Jun 6, 1:45 pm, "Paul B. Andersen" wrote:
On 06.06.2013 18:33, wrote:
I am really curious here : you mean GR predicts exactly 43"
per century? What are the limits of error he if we improve
the accuracy of measurements in the future and it turns out
to be 43.0001" per century does it mean GR is invalidated or
just simply not accurate, or do we blame the other effects
for this?
According to:
Myles Standish, Jet Propulsion Laboratory (1998)
GR predicts 42.98 +/- 0.04 arc secs per century.
According to:
Clemence, G. M. (1947). "The Relativity Effect in Planetary Motions".
Reviews of Modern Physics 19 (4): 361–364.
The tug from other planets is 531.63 +/- 0.69
and the observed is 574.10 +/- 0.65 arc secs per century
(both relative to 'stationary space')
So the 'anomaly' is 42.45 +/- 1.13 arc secs per century
GR's prediction is well inside the error bars.
Has Paul ever examine the precession of the equinox more closely?
shrug
http://en.wikipedia.org/wiki/Axial_p...ion_(astronomy)
According to the above link, the exact period is 25,772 years (with no
error bar given) which translates to 257.72 centuries.
360 * 60 * 60 / 257.72 = 5,028.7”
As Paul has pointed out, Le Verrier had observed 5,600.0” (with no
error bar given and with unknown digits of significance but at least
2).
5,600.0” – 5,028.7” – (531.63” +/- 0.69”) = 39.7” +/- 0.7”
It is about 3” less than the fudged prediction of the Schwarzschild
metric. So, it looks like the data is fudged as well as the
prediction. shrug
Want to go through the differential equations? Are you up to it at
your elderly age? :-)
What's your point?
According to Le Verrier himself the anomaly was 38"
"within one second", which is even further from GR's prediction.
So what?
Le Verrier's achievements were impressive for its time,
but now they are mostly of historical interest.
And note that the more resent data I gave above were
relative to 'stationary space', that is relative to
a frame of reference that doesn't rotate with the equinoxes.
--
Paul
http://www.gethome.no/paulba/
============================================
Yeah, but how many angels DO dance on the head of a pin?
http://en.wikipedia.org/wiki/How_man...ad_of_a_pin%3F
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