The Kepler KOI 730 System Rotating Coordinates
In this integration the coordinates are rotated in order to hold
planet 703.03 in a constant direction relative to the star. (This has
the side effect that the outer planet appears to be going
"backwards"). We can now focus on the relative positions of 703.02 and
703.03 and see how they try to keep to the Lagrange points 60 degrees
apart. However they drift to and fro quite a lot. Try speeding up the
integration and click on "orbits" to get a better impression of the
effects. Lissauer et al say they have run this integration (on a
supercomputer) for 25My before the two planets get too close and
disaster happens. However, the real planets have probably been in this
configuration for billions of years - its just that we do not yet have
accurate information about their masses and orbits.
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