ch as the neptune–pluto system.
1.2previous studies and aims of this research
in addition to the vagueness of the concept of stability， the planets in our solar system show a character typical of dynamical chaos (sussman & wisdom 1988， 1992). the cause of this chaotic behaviour is now partly understood as being a result of resonance overlapping (murray & holman 1999; lecar， franklin & holman 2001). however， it would require integrating over an ensemble of planetary systems including all nine planets for a period covering several 10 gyr to thoroughly understand the long-term evolution of planetary orbits
对火星轨道变化问题的最后解释(6/49)