Features： - Includes vocabulary word hunt with pronunciations， glossary， and index- Labeled diagrams and timelines- Beautiful， full-color photographs- Simple interior design and easy-to-read fonts- Web sites for further research and information- Vocabulary preview and review pages plus backmatter pages that invite readers to think further on the study topics- Fits science curriculum standards for earth and space science and science and technologyWhat's New： - Updated illustrations and photos- Updated art of solar system shows 8 planets and their orbits instead of 9- New Pluto book includes a list of other dwarf planets， in addition to Pluto， in our solar system- Updated information on space missions， moons， and planets- Updated Web sites for further information in backmatter- Updated indexes