感谢 lpetrich 为我们带来以下两段精彩视频！
Saturns Orbit Eccentricity Precession, Last 10 Myr


视频介绍：
Saturn's precession of its orbit eccentricity (e) and perihelion longitude (omega) over the last ten million years, a result of the planets' gravitational pulls on each other. The center + is for a circular orbit. Referred to present (J2000) equinox and ecliptic. Calculated from the quasiperiodic-series approximations in J. Laskar, "Secular evolution of the Solar System over 10 million years", Astronomy and Astrophysics, 198, 341-362 (1988).


Earth_s Orbit Inclination Precession, Last 10 Myr


视频介绍：
Earth's precession of its orbit inclination (i) and ascending node (Omega) over the last ten million years, a result of the planets' gravitational pulls on each other. It helps produce the "Milankovitch cycles" of the Earth's sunlight inputs, which are involved in the comings and goings of the Ice-Age continental glaciers. The center + is for the invariable plane. Referred to present (J2000) equinox and ecliptic. Calculated from the quasiperiodic-series approximations in J. Laskar, "Secular evolution of the Solar System over 10 million years", Astronomy and Astrophysics, 198, 341-362 (1988). 

能看懂的朋友们，可以形象地介绍一下吗？谢谢了...

不知道视频想表达什么！！ = =！

像摆线···

就是行星公转轨道的近地点远地点会不断变化。

土星和地球的自转与公转（绕日）的轨迹

不错

Ceres 27

手机党