 These were not the full equations of motion, but rather averaged equations along the lines of those used by Laplace.Laskar's work showed that the Earth's orbit (as well as the orbits of all the inner planets) is chaotic and that an error as small as 15 metres in measuring the position of the Earth today would make it impossible to predict where the Earth would be in its orbit in just over 100 million years' time.Jacques Laskar and his colleague Mickaël Gastineau in 2008 took a more thorough approach by directly simulating 2500 possible futures.