106 



HISTORY OF ASTRONOMY. 



The following diagram represents the apparent orbits 

 of the four satellites of Uranus for November, 1852. 

 The major axes of all the orbits are nearly perpendicular 

 to the ecliptic; The minor axis of each of the apparent 

 orbits is about three quarters of the major axis, but the 

 true orbits of the satellites differ very little from circles. 



*-.,. 



\ \ 



1) 



APPARENT OBBITS OF THE SATELLITES OF TJBANUS FOB NOVEMBER, 1852. 



The planet Uranus is fast approaching the position 

 most favorable for the observation of its satellites. It, has 



