Riddle me this

So after my last little question I thought I might post a little brain teaser for you all to try and work out. Go on and give it a try. Just don't bang your head to hard if you don't get the answer right away.

I live above a star, and yet I never burn,
I have eleven neighbours, and yet none of them turn,
P,R,S (& sometimes Q) are my initials, now tell me what I mean

Have fun
Ice Koobs