The earth in its rapid motion round the sun possesses a degree of living force so vast that, if turned into the equivalent of heat, its temperature would be rendered at least one thousand times greater than that of red-hot iron, and the globe on which we tread would in all probability be rendered equal in brightness to the sun itself.
James Prescott Joule, The Scientific Papers of James Prescott Joule - Volume 1
earth, heat, motion, physics, science