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PREFACE                                                                    7

 

 

INTRODUCTION                                                      13

 

 

I. LIFE IN THE UNIVERSE                                     19

 

A.  

B. II. THE SUN AND THE STARS                                 41

C.  

D.  

E. III. GALAXIES                                                         71

F.  

G.  

H. IV. BLACK HOLES AND QUASARS;

I.  

J.    The Most Enigmatic Objects in the Universe             85

K.  

L.  

M. ABOUT STARDUST                                               105

 

 

VI. PLANETARY RINGS                                           113

 

 

VII. VENUS UNVEILED                                            123

 

 

VIII. MARS EXPLORATION;

 

    The Next Step in Man’s Conquest of Space           129

 

 

IX. PLANETARY SEASONS                                      151

 

 

X. A SCARY STORY;

 

     The Threat to the Earth from Asteroid Impact;

     Beyond the Solar System, and Global Warming        157

 

 

MYSTERIES OF THE UNIVERSE

PART TWO

TABLE OF CONTENTS