Making entities rotate around another specified entity

So, what is the idea: I have an armor stand, let's call it "center", positioned at specific position. Around it, there's 10 armor stands for -x, -z and etc to make a * shape, let's call them "lasers". I need to rotate all of those lasers around center smoothly at the same time, but I have absolutely no idea on how to rotate them, only about making the rotation smooth. I looked everywhere and found nothing on it.