地球的瞬时迹面

The Instantaneous-Cone of the Earth

将地球简化为做定点运动的刚体时,其运动方程可积分的情况,有且只有一种,即Lagrange-Poisson情况,在其解算过程中,从数学方法上衍生出来的Euler-Poinsot情况,并非独立情况,而是由前一种情况派生出来的.

Let′s simplify the earth as a rigid body motions with the point fixed,its movement equation can be integral condition has the only one category,that is Lagrange-Poisson case.In the process of solution and calculation,the Euler-Poinsot case of the derivation is produced from mathematics method,which is not independent.It is derivative of the precedence case.