De revolutionibus orbium coelestium De revolutionibus orbium coelestium De revolutionibus orbium coelestium ("On the Revolutions of the Heavenly Spheres") is the seminal work on the heliocentric theory of the Renaissance astronomer Nicolaus Copernicus (1473–1543). The book, first printed in 1543 in Nuremberg, Holy Roman Empire, offered an alternative model of the universe to Ptolemy's geocentric system, which had been widely accepted since ancient times. Copernicus initially outlined his system in a short, untitled, anonymous manuscript that he distributed to several friends, referred to as the "Commentariolus". A physician's library list dating to 1514 includes a manuscript whose description matches the "Commentariolus", so Copernicus must
Return to the Centre of the Earth idea soon after, partly due to Richard Branson's world record attempts to circumnavigate the Earth by hot air balloon and thinking people will relate his music to the event. Soon after, Wakeman came across a newspaper article by Steven Spielberg, "who was talking about have sequels for making films, how you have a story and you spin up from the story for a whole new story, but you have a relationship, which is very comfortable for the people who listen a whole new story, new characters, but there's still a relationship." This prompted the thought in Wakeman's mind, after revisiting