PLEASURES OF THE TELESCOPE. 



467 



smaller than our planet Jupiter, but shining, of course, by its own 

 light. Its distance from Pollux, however, exceeds that of Jupiter 

 from the sun in the ratio of about one hundred and thirty to one. 



o 



In the double star tt we shall find a good light test for our 

 three-inch aperture, the magnitudes being six and eleven, dis- 

 tance 22", p. 212. The four-inch will show that k is a double, 

 magnitudes four and ten, distance 6", p. 232. The smaller star 



