行星的摄动使得地球绕太阳的轨道是不规则的。
Planetary perturbations make the earth's orbit about the sun irregular.
由迭代算法得到的直到六阶的摄动补充完整了远日的四个行星的理论。
Perturbations up to the sixth order obtained by an iterative method complete the theory of the four outer planets.
该VSOP82方法是由考虑了所有行星质量的展开到三阶的摄动构成的。
The VSOP82 solution is made of the perturbations developed up to the third order of the masses for all the planets.
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