1. Sungrazing Comets by Mohammad Khan

2. I used Runge-Kutta method to plot the trajectories of the comets
I used Runge-Kutta method to plot the trajectories of the comets. f1 = kepler_ode(t , y ); f2 = kepler_ode(t+dt/2, y+f1 .* (dt/2) ); f3 = kepler_ode(t+dt/2, y+f2 .* (dt/2) ); f4 = kepler_ode(t+dt , y+f3 .* dt );
Declare the following as global:
mSun = 1e+7;
mPlanet = 1e+4;
G=1;
mComet = 1;
Define the vector y that contains 16 elements
y=[rs(1); rs(2); vs(1); vs(2);
rp(1);rp(2);vp(1);vp(2);
rc(1);rc(2);vc(1);vc(2);
rc2(1);rc2(2);vc2(1);vc2(2)];