194 LABORATORY LESSONS IN GENERAL SCIENCE 



vations made by you (either with or without assistance) to 

 write answers to the following requirements : 



(a) Whether the path of any star (or constellation) across 

 the sky night after night is always the same. 



(6) What is true of the places of rising (or setting) of the 

 same star night after night. 



FIG. 86. Polar constellations. 



(c) The names of several constellations always above 

 horizon (that never "set") to observers in your latitude. 



(d) The appearance of the Milky Way. Its place in the 

 sky relative to some known constellations. Its real nature. 



