Jan Panteltje wrote:

Newton still rules, and no abberations have been found in our solar system.

Because newton is curvefitted to heliocentric system,
where distant planets are moving slower than closer planets;
and where planets are accelerating at perihelion
and decelerating at aphelion. None of this is real from the
galactic perspective, because all planets keep pace with the Sun,
averaging the same galactic speeds.
Even orbits disappear in the galactic frame, because
when a planet slows down at perihelion,
http://quest.nasa.gov/galileo/Galile...avity_Assist.1
and the Sun passes the planet, a visual effect is created that the
planet is moving backwards to form an ellipse. There is no
retrograde motion in the galactic frame and Newton will suffer.
John Curtis
..