From the Big Bang to Planet X: The 50 Most-asked Questions about the Universe-- and Their Answers | Terence Dickinson
What exactly is the Big Bang theory? What came before it? What is a black hole? How do we know the universe is expanding? These are only five of 50 questions leading North American astronomer Terence Dickinson answers here from the many asked during his lectures and interviews. In his bestselling, down-to-earth style, Dickinson unravels the mysteries of the cosmos.
From the Big Bang to Planet X: The 50 Most-asked Questions about the Universe-- and Their Answers | 
