Universe is a 512-page, non-fiction book by nine British co-authors (listed alphabetically below) with a short Foreword by Sir Martin Rees, first published in 2005. The book is divided into three sections, beginning with an introduction to theories of the Universe, space exploration, Earth's view of space and how the Universe will end. The second section, "Guide to the Universe," contains information on the Sun and our Solar System, as well as our Galaxy, the Milky Way, and other types of galaxy. The last section, "The Night Sky," has full-page maps and charts of the night sky for both northern and southern viewers as well as a comprehensive list of the constellations. The book contains full-colour pictures, maps, and probe photographs. There are in-depth looks at features of planets in our solar system, such as Venus's craters and Mars's ridges. There are also captions describing the scientists and stories behind various discoveries. The book was produced in London, England, by Dorling Kindersley [1] and is published internationally. A revised and updated edition was published in September 2007, including recent developments such as the reclassification of Pluto as a dwarf planet.