I don't think anyone would want to live in any of the solar systems I made, they would live very long. This is a brilliantly simple idea and very slickly implemented. No fuss just throw your planets around the sun. Great feeling if you manage to get a nice circular orbit and great fun throwing in an elliptical one in and seeing how long it takes to take out all the previous planets. Find myself drawn back to this for just one more go. Very nice indeed.