Top: extrapolation of the planets semi-major axis until 2065 for the best model for Kepler-9b (red, left) and Kepler-9c (blue, right). Grey areas show the 99.74% confidence interval of 1000 randomly chosen good models for the different data sets. From light to dark grey: modelling of data sets I, II, and III. Second from top: extrapolation of the planets eccentricity. Third from top: extrapolation of the planets inclination. Fourth from top: extrapolation of the calculated impact parameter. Bottom: extrapolation of the calculated transit duration. The background of the impact parameter and the transit duration is coloured to highlight the place where the prediction of disappearing transits comes from.