Book excerpt: If Earth is round, why don't people on the other side of the world fall off? (see page 26) Is Mars red because it's embarrassed? (see page 49) If black holes are invisible, how do we know they're there? (see page 86) /h3 Using the popular style that has won millions of readers, best-selling author Kenneth C. Davis blasts off for the stars! With an entertaining question-and-answer format, amusing anecdotes, and fact-filled sidebars, he sets his sights on the mysteries of space. Humorous illustrations, along with NASA photographs, add fun and excitement to this fascinating and comprehensive book. Davis takes you back to the time when the Babylonians first charted the stars -- over three thousand years ago! You'll uncover amazing facts about the planets and stars, read how people were once convinced that Earth was the center of the universe, and discover how the experience of moonwalking astronauts may someday lead us to become pioneers on other planets. This book is the perfect companion to Don't Know Much About® The Universe -- and all the other books in the New York Times best-selling Don't Know Much About® series.