def dr_dt(y, t):
"""Integration of the governing vector differential equation.
d2r_dt2 = -(mu/R^3)*r with d2r_dt2 and r as vecotrs.
Initial position and velocity are given.
y[0:2] = position components
y[3:] = velocity components"""
G = 6.672*(10**-11)
M = 5.972*(10**24)
mu = G*M
r = np.sqrt(y[0]**2 + y[1]**2 + y[2]**2)
dy0 = y[3]
dy1 = y[4]
dy2 = y[5]
dy3 = -(mu / (r**3)) * y[0]
dy4 = -(mu / (r**3)) * y[1]
dy5 = -(mu / (r**3)) * y[2]
return [dy0, dy3, dy1, dy4, dy2, dy5]
解决这个问题后,我想绘制它.它应该是一个椭圆形,但说实话,我也不确定如何做到这一点.我正考虑采取位置的大小,然后随着时间绘制它.如果有更好的方法,请随时告诉我.
谢谢.
