| CHAPTER | | PAGE |
| I | Astronomy a Living Science | 9 |
| II | The First Astronomers | 19 |
| III | Pyramid, Tomb, and Temple | 23 |
| IV | Origin of Greek Astronomy | 27 |
| V | Measuring the Earth—Eratosthenes | 30 |
| VI | Ptolemy and His Great Book | 33 |
| VII | Astronomy of the Middle Ages | 37 |
| VIII | Copernicus and the New Era | 42 |
| IX | Tycho, the Great Observer | 45 |
| X | Kepler, the Great Calculator | 49 |
| XI | Galileo, the Great Experimenter | 53 |
| XII | After the Great Masters | 57 |
| XIII | Newton and Motion | 62 |
| XIV | Newton and Gravitation | 66 |
| XV | After Newton | 73 |
| XVI | Halley and His Comet | 83 |
| XVII | Bradley and Aberration | 90 |
| XVIII | The Telescope | 93 |
| XIX | Reflectors—Mirror Telescopes | 102 |
| XX | The Story of the Spectroscope | 111 |
| XXI | The Story of Astronomical Photography | 125 |
| XXII | Mountain Observatories | 139 |
| XXIII | The Program of a Great Observatory | 152 |
| XXIV | Our Solar System | 162 |
| XXV | The Sun and Observing It | 165 |
| XXVI | Sun Spots and Prominences | 174 |
| XXVII | The Inner Planets | 189 |
| XXVIII | The Moon and Her Surface | 193 |
| XXIX | Eclipses of the Moon | 206 |
| XXX | Total Eclipses of the Sun | 209 |
| XXXI | The Solar Corona | 219 |
| XXXII | The Ruddy Planet | 227 |
| XXXIII | The Canals of Mars | 235 |
| XXXIV | Life in Other Worlds | 242 |
| XXXV | The Little Planets | 254 |
| XXXVI | The Giant Planet | 260 |
| XXXVII |
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