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
Battle of the Planets Planets" is the title of American adaptation of this series created by Frank. Frank authorized new footage and hired writers to add dialogue to fit the look of the animation, without reference to original scripts. Of the 105 original "Gatchaman" episodes, 85 were used in the "Battle of the Planets" adaptation produced by Sandy Frank Entertainment in 1978. "Battle of the Planets" cast five young people as G-Force, consisting of Mark, Jason, Princess, Keyop, and Tiny. G-Force protects Earth from the planet Spectra and other attacks from beyond space. The most prominent field commander of the Spectra forces was a