So, you may ask, what is a binary star system. Well, a binary star system is where two stars close to each other also orbit each other. Some of these systems have more than two stars, but then it wouldn't be called a binary (meaning two) system, would it?
Most of these systems are stable but some are not. The picture below depicts the path of two stars swirling closer and closer and closer to each other, until they combine, probably with a big bang or a nova, and if they are huge enough, with a super nova.
Well I learned something new today. I have always said that a day is wasted if you don't learn something new, and let me tell you, I have wasted a lot of days (grin). Now you all have a great day, you hear?