64 



Solar and Planetary Evolution. 



spiral formation of a new order, as if a star had revolved 

 around another star, which was itself in motion, and had 

 left a train of nebulous matter behind it like a comet. 

 (See spiral nebula in Canes, Figure 13, page 69.) A pho- 

 tograph (thrown upon the screen) of a strange nebulous 

 object attached to the star Maia in the Pleiades, is interest- 



Fig. 9. Surface of the Sun, magnified, showing granular, or "rice-grain" 



appearance. 



ing as being the picture of an object which has never been 

 seen by the eye of man, even by the aid of the most power- 

 ful telescope. The photographic plate is more sensitive 

 than the retina of the human eye. This is an apparent il- 

 lustration of the hypothesis that all nebulae may have been 



