Here's one of those things that shouldn't really be that surprising, and yet, it fascinates, a brilliant little piece from BBC News on how stars make noise. Scientists have recorded the sound of three stars similar to our Sun using France's Corot space telescope. Interesting article here.
You can click on various links on the page to hear a real star pulsating. I like to think of them as giant cosmic crickets up there in the sky, clicking away to each other.