The features of shock wave can be analyzed qualitatively in the velocityplane for a special perturbed gravitation which is used to simulate the self-gravitation of interstellar gas.
对一种特定的扰动引力场模拟气体自引力,可以在速度平面上定性分析激波解的特性。
2
And out of this information you get the radius, the velocity and the period, assuming that you are on Earth in the plane of the orbit of the stars.
除了这个,还能得到半径的大小,速度以及周期,假设你在地球上,和这些恒星环绕的,轨道同处一个平面。
3
OK, if I'm moving in the plane, then position and velocity are in there.