Download or read book Dialogue Concerning the Two Chief World Systems, Ptolemaic and Copernican, Second Revised Edition written by Galileo Galilei and published by Univ of California Press. This book was released on 1953 with total page 524 pages. Available in PDF, EPUB and Kindle. Book excerpt: Galileo's outstanding scientific work supporting the new Copernican conception of the universe (which led to the famous trial). In the form of a conversation among characters named Salviati, Sagredo, & Simplicio.