I needed a break from studying math physics. So I wrote this tutorial up in maybe half an hour. I only hope there are no spelling errors, lol.
Yes spacefans! Now you too can add things such as interstellar dust and bigger stars to your spacescape (or whatever you might be doing, 'cause the stuff I do can be applied to lots of things so long as ya tweak the system a bit.)
p.s. yes that is the Euler - Lagrange equation for motion. ~Sigh~ I need to get out more, lol.