I was in my physics class (electricity and magentism) tonight and we were going over more of The Special and General Theory of Relativity. My professor said that nuclear propulsion and neclear science (in general) was banned in space. I can see why weapons would be banned... but why nuclear propulsion? If they can use it in submaries, then why not spacecraft?

I just thought about that on my way home from class and was just curious of peoples opinions. I'll ask him more about it on Wednesday.