Re: Mercury's Orbit of Advance Calculated by Einstein

From: Bill Hobba (bhobba_at_rubbish.net.au)
Date: 07/25/04 

Date: Sun, 25 Jul 2004 00:31:29 GMT

"greywolf42" <mingstb@marssim-ss.com> wrote in message
news:10g2nprtos4k08@corp.supernews.com...
> Australopithecus Afarensis <fossil.lucy@cox.net> wrote in message
> news:qv1Mc.7614$_K2.7475@lakeread02...
> > According to the article referred by Bjerknes,
> >
> > http://arxiv.org/PS_cache/physics/pdf/9811/9811050.pdf
> >
> > Einstein calculated the advance of Mercury's orbit around the sun a few
> > weeks before General Relativity was presented by himself. Does any one
> > know how Einstein was able to calculate this advance of Mercury's orbit
> > with incomplete field equations? And a few months before
> > Schwarzschild derived the Schwarzschild metric?
>
> The GR field equations were completed in 1913. Marcel Grossman and Albert
> Einstein jointly provided a complete "general theory of relativity" in a
> paper of that date. This is historically distinguished as the "Entwurf"
> version of GR. The equations remain unchanged between 1913 and 1915-6.
> However, Einstein modified the philosophy (definitions) of the equations
> from 1913, specifically to correct a percieved anomaly.

That is simply a boldfaced distortion and lie. The EFE's were independently
discovered by Hilbert and Einstein towards the end of 1915. In the case of
Einstein specifically November 25th 1915, for Hilbert 5 days previously. He
and Grossman had previously rejected the final equations for what at the
time seemed compelling reasons - it was a long journey of discovery where he
developed complete faith in the principle of general covariance that
cumulated in the 1915 equations. This is discussed in detail on page 239 -
261, Chapter 14 of Pais Subtle is the Lord. If you wish to challenge what
Pias says then detail your references. The unimodular theory he held to
previously - namely sqrt g = 1 and Ruv = Tuv is obviously incorrect and its
scrapping to give the final equation Guv = Tuv is much more than mere
philosophy.

Bill

>
> Coincidentally, the anomaly that Einstein was correcting was the
difference
> between Newcomb's value for the NNPA of Mercury (42 arcseconds/century)
with
> the results of the "Entwurf" definitions (18 arcseconds per century). By
> changing the definitions (and thus allowing a different calculational
> method) Einstein was able to match Newcomb's value. Once Einstein matched
> the value, he figured he'd hit on the right interpretation.
>
> ["(Einstein) did know of the Entwurf prediction, for he wrote to Arnold
> Sommerfeld on the 28 Novermber 1915 that his previous field equations were
> 'entirely untenable' and that one of the reasons that he had known this
was
> that the motion of the perihelion of Mercury was '18'' instead of 45''
(sic)
> per century' (Hermann 1966, p. 32)." (Roseveare, 1982)]
>
> > Is this an event that finally has proven time
> > traveling as a very real possibility?
>
> I would say no.
>
> > Also, does any one know who
> > actually derived it since Einstein's math was known not to be so sharp?
>
> The EFE were originally produces by Marcel Grossmann. Dr. Grossmann was a
> frequent collaborator and collegue of Dr. Einstein. And Dr. Grossmann was
> by all accounts a first rate mathematician.
>
> --
> greywolf42
> ubi dubium ibi libertas
> {remove planet for return e-mail}
>
>

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