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. Supports the Common Core State Standards.