Built from the ground up on our new understanding of the universe, The Essential Cosmic Perspective, Fourth Edition Media Update retains all of the features that have made this text so popular, and includes updated supplements that enhance the book's pedagogy to make it the most effective text in the one-semester astronomy market. This edition features optional quantitative reasoning boxes, basic equations throughout the text, new end-of-chapter problems, and a consolidated math appendix for professors who want to emphasize quantitative understanding in their course. Key figures have been annotated to guide student interpretation of difficult concepts. New two-page Cosmic Context illustrations throughout the text, visually tie together key concepts from across chapters and put them in context, driving home main ideas in a meaningful way. The Essential Cosmic Perspective,Fourth Edition Media Update provides an unprecedented media package. MasteringAstronomya , the most easy-to-use, yet sophisticated astronomy tutorial and assessment system ever built, provides both instructor-assigned homework as well as a self-study area with Bennett's popular Interactive Tutorials, Interactive Figures and Photosa , quizzes and more. An updated Essential Cosmic Lecture Launcher CD-ROM includes high resolution JPEGs of all images in the text for improved in-class projection, Interactive Figures and Photosa based on figures from the book, PowerPoint(R) Lecture Outlines, and Clicker Quizzes based on the book and book-specific interactive media, plus a variety of additional instructor resources. The Astronomy Media Workbook, Fifth Edition is now updated to correlate with MasteringAstronomya and Voyager: SkyGazer v3.7 planetarium software.