FIG. 4.--NEBULA NO. 101 IN MESSIER’S CATALOGUE 70 FIG. 5.--NEBULA NO. 51 IN MESSIER’S CATALOGUE 71 FIG. 6.--MILKY WAY BETWEEN CASSIOPEIA AND SWAN 76 According to Wolf. FIG. 7.--MILKY WAY IN EAGLE AND SAGITTARIUS 76 According to Wolf. FIG. 8.--THE “TRIFID” HOLE IN EAGLE 77 According to Wolf. FIG. 9.--TARIM RIVER WITH LAKES AND BAYIRS 96 According to Sven Hedin. FIG. 10.--THE FORMER LAKE BONNEVILLE IN UTAH 106 FIG. 11.--JUPITER, 1909 122 According to F. le Coultre. FIG. 12.--SATURN, 1909 123 According to F. le Coultre. FIG. 13.--SPECTRA OF THE MAJOR PLANETS 124 According to V. M. Slipher. FIG. 14.--VENUS OBSERVED BY LANGLEY IN 1882 136 FIG. 15.--ROCK FISSURE AT HANGO, SWEDEN 204 Photo by I. I. Sederholm. FIG. 16.--EARTHQUAKE CENTERS IN CALABRIA 205 According to I. I. Sederholm. FIG. 17.--MAPS OF MARS BY SCHIAPARELLI AND ANTONIADI _At the end_ FIG. 17a.--MAPS OF MARS BY SCHIAPARELLI AND ANTONIADI _At the end_ FIG. 18.--PHOTO OF MARS BY LAMPLAND 210 FIG. 19.--MARS ON APRIL 8, 1909 210 According to Quenisset. FIG. 20.--THE SOUTH POLE SPOT ON MARS, 1909 210 According to Jarry Desloges. FIG. 21.--SANDSTORM ON MARS, 1909 210 According to Antoniadi. FIG. 22.--CLOUD ON EDGE OF MARS, THE 7TH OF MARCH, 1901 216 According to Molesworth. FIG. 23.--MARS, JULY 11, 1907 216 According to Lowell. FIG. 24.--MARS, OCTOBER 6, 1909 216 According to Antoniadi. FIG. 25.--MERCURY 230 According to Lowell. FIG. 26.--THE MOON NEAR THE CRATER TYCHO 230 Photo from Yerkes Observatory. FIG. 27.--MARE SERENITATIS AND MARE TRANQUILLITATIS 231 Photo from Yerkes Observatory. FIG. 28.--THE MOON NEAR ITS SOUTH POLE 240 Photo from Yerkes Observatory. FIG. 29.--THE LUNAR CRATER COPERNICUS AND VICINITY 242 Photo from Yerkes Observatory. The Destinies of the Stars CHAPTER I THE ORIGIN OF STAR-WORSHIP