RelativKritisch

Barney · Anmeldedatum: 19.10.2008 Beiträge: 1538

Hi JANm and Frank,

in the usual relativistic calculations of the perihelion shift, the mass of the test body is neglected. Jan, do you expect new effects, e.g. verification/falsification of the Heim potential, while calculating the two-body or n-body problem using GR or Heim theory?

Using mean values is probably no good idea, because you will use then not common used exact definitions and principles. If we would have exact two or n-body calculations, we would use automatically exact definitions about the center of mass of the system in the sense of Frank and the wikipedia article. Unfortunately, I have no good idea about how to take the mass of the test body (e.g. Mercury) into account in GR. I know that there are numerical calculations of rotating pairs of neutron stars or black holes, but I know nothing about the used mathematical algorithms there.
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JANm · Verfasst am: 13.06.2009, 02:19 Titel:

[quote="FrankSpechtNo, Jan, that's not correct. The barycenter IS the center of mass in atrophysics. [/quote]
Hello FrankSpecht
So if you state that the barycentre is the center of mass in astrofisics (you lost an s there) then the Gauss centre is indeed improvement.
70.000 km of the centre from the sun (nobody is interested in which direction, I still don't know if somebody is: that I would tell it!)
But suppose you have a invariable plane a time invariant thing planets can move through the climbing knot up, while others move below...
in such a way that the total rotational impulse remains the same.
The planets can also flatten their path by joining this plane...
But now what is the TIME INVARIANT centre of this invariable plane?
Please don't tell me that the actual gravitational centre is the time invariant centre? So You prooved that there is a difference between barycentre an Gaussian centre and you also prooved that it should not be the barycentre considered as centre of the invariable plane but the Gaussian centre...
greetings Janm
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Weiss nicht viel aber was ich weiss benutze ich.