Red Hypergiant

I knew most of that, but thanks for replying!

(And thanks for reminding me that it could shoot either way! Lol, that would be a catastrophe if I forgot!)

So, as a science project, I was thinking about making a rail gun. I have researched them a bit, but there's still a lot I don't understand about them. What's necessary? What do all the equations mean? I could use all the help I could get.

Thanks.