Since the dawn of humankind, people have looked upward to the heavens and tried to understand them. This encyclopedia takes you on an expedition through time an

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The simplest guide to astronomy and stargazing! Grasping astronomy has never been easier. Your awe of the night sky will soon turn into knowledge of the constel

Superb full-color photographs of scientific instruments, experiments, and innovative 3-D models reveal the discoveries and research that have transformed our un