| A WHIRLING SPIRAL NEBULA, TYPICAL OF THAT FROM WHICH THE SUN AND PLANETS WERE PROBABLY EVOLVED | [Frontispiece] |
| MAP SHOWING THE CONSTELLATIONS OF THE ZODIAC AND THE LINE OF THE ECLIPTIC RUNNING THROUGH THEM | Facing p. [76] |
| THE LOVELY CRESCENT THAT VENUS SHOWS WHEN TO OUR VIEW SHE IS AT HER GREATEST BRILLIANCY | " [136] |
| RELATIVE APPARENT SIZE OF VENUS AT DIFFERENT PHASES OF ILLUMINATION | Page [137] |
| THE TWO PHASES OF MARS | Facing p. [152] |
| MARS: DIFFERENCE IN ITS APPARENT SIZE AT ITS NEAREST, MIDDLE, AND FARTHEST DISTANCE FROM THE EARTH | Page [169] |
| JUPITER, THE MAMMOTH MEMBER OF THE SOLAR FAMILY—LARGER THAN ALL THE OTHER PLANETS PUT TOGETHER | Facing p. [184] |
| SATURN AND ITS RINGS | " [220] |