It's mind blowing software - when I first run it (it was 0.94v and it was starry night outside to add to the mood) I swear I got agoraphobia while sweeping through the Milky Way galaxy. Not to mention you can visit any other real or procedurally generated galaxy in an instant. Also interesting are solar systems within star clusters - if you ever wondered how the night sky would looked like on a planet inside one of the star clusters you can see it here - amazing.