Page:A short history of astronomy(1898).djvu/153

§ 81] the sun, the order of distance Mercury, Venus, Earth, Mars, Jupiter, Saturn being also in accordance with the rates of motion round the sun, Mercury performing its revolution most rapidly (in about 88 days ), Saturn most slowly (in about 30 years). On the Coppernican system

the moon alone still revolved round the earth, being the only celestial body the status of which was substantially