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Old December 29th 08, 07:00 AM posted to sci.physics,sci.physics.relativity,sci.astro
Peter Webb[_2_]
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Default The Motion of the Perihelion of Mercury


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THE MOTION OF THE PERIHELION OF MERCURY
In his general relativity calculation of the motion of the perihelion
of Mercury Albert Einstein had only taken into account the
gravitational actions between the Sun and the Mercury, which he also
assumed as two points.

What will be, according to the theory of general relativity, the value
of the motion of the perihelion of Mercury if the gravitational
actions of all the planets in the solar system are taken into account
and also it is taken into account that the Sun is a little oblate?

Have any done these calculations?

Best regards
Louis Nielsen
Denmark


AFAIR, the best experimental evidence we have is good to only a couple of
decimal places. I think we can dispense with the planets pretty quickly.
Venus weighs 1/500,000 of Sun, and that's the nearest one. Effects from the
Sun being oblate you would have to imagine are at least 2nd or 3rd order,
and its not very oblate at all.

Long and short is that measuring these effects would be experimentally
impossible, I bet.