coMSTOCK OUR OWN SUN AND HIS OWN FAMILY 



307 



to that of the Earth and 

 next to that of Mars, 

 and then jump over to 

 those of Jupiter and 

 Saturn and Uranus and 

 Neptune just as you 

 would hop from rail to 

 rail across the railroad 

 tracks in a freight- 

 yard; and all of the 

 worlds go around the 

 sun in the same direc- 

 tion exactly opposite to 

 the way that the hands 

 of a clock move, and 

 each one rotates on its 

 own axis just like the 

 earth although their 

 days and nights may be 

 longer or shorter than 

 ours; and all of the 

 worlds shine by reflect- 

 ing the light of the sun 

 just as does otir moon. 

 We also have proven 

 that the same chemical 

 elements exist in all of 

 these worlds though 

 - perhaps in different 



proportion than in ours, although we may lack some possessed by 

 the outermost. The same sun warms them all, the same stars shine 

 down on them all, but each has a different number of moons than 

 ours or none at all. 



There are many very interesting differences among the members 

 of our world family, and the very greatest difference between our 

 world and the others, is that we live on it and we do not know who 

 olives on the others. 



Mercury is the baby darling of the great sun's family because it 

 is such a little world, only 3,400 miles in diameter, only about a third 

 larger than our moon. Mercury hasn't any moon of its own, but 



Relative size of the Planets 



