The prefect sized books for backpacks, DK's Pocket Genius series is bright, inviting, concise, and punchy -- the ideal source for reference. Featuring essential information, full-color images, glossary, and top ten lists, these books are a brand-new type of encyclopedia for young readers. From marvelous galleries of The Big Dipper, Little Dipper and other constellations, to in-depth looks at Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune, to the Moons of Jupiter, comets and galaxies -- not to mention entries on rockets and spacecraft -- this visual encyclopedia opens up the vast and mysterious expanse of space. 160 pages. Ages 8+.