The concept of gravity provides a natural phenomenon that is simultaneously obvious and obscure; we all know what it is, but rarely question why it is. The simp

Includes bibliographical references (p. [397]-410) and index.

Using an engaging how-to approach that draws from scholarship, real-life, and popular culture, this textbook offers students practical reasons why they should c

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The New York Times bestselling tour of the cosmos from three of today's leading astrophysicists Welcome to the Universe is a personal guided tour of the cosmos