LEARNING ABOUT THE STARS 



171 



3. You should learn something about the tools 

 which the astronomer uses. Do not try to learn all 

 about the workings of these, as they are quite com- 

 plicated, but know the chief differences of the two 

 types of telescopes and for what the spectroscope is 

 used. In connection with this problem you may wish 



the ancients saw some likeness to an animal or god 



or with which they associated some myth or legend. 

 luminous giving off light. 

 refraction the bending of light rays. The common bent 



appearance of a stick when placed in water is due to 



refraction. 



January 



*sr 



NORTH 



CAST 



*rsw* ..I^(-..F t--w. CAST SOUTH 



From The Science Classroom. Courtesy of Popular Science Publishing Co. 



FIG. 285A. STAR MAPS 



to learn something of the great astronomical ob- galaxy our system of stars in space, including the Milky 



servatories of the world. 



4. You may find the following new words and 

 phrases in this study : 

 constellation a group of stars, in whose peculiar shape 



Way. 



meteor commonly referred to as a "shooting star" but 

 incorrectly. It is a piece of matter falling through 

 space which is heated to glowing by the friction of the 



