Using nothing more than Newton's laws of gravitation, we astronomers can confidently predict that several billion years from now our home galaxy—the Milky Way—will merge with our neighboring galaxy—Andromeda…Any life on the worlds of that far off future…would be treated to an amazing billion-year-long light show; a dance of a half a trillion stars, to music first heard on one little world, by a man who had but one true friend.