HOW TO GET ACQUAINTED WITH CONSTELLATIONS 211 



make a luminous star chart, or study the star groups with your 

 chart, if you have one already made. When your film has been 

 developed and printed, you will find curved paths circling part 

 way around the polar star but nearly straight paths in the picture 

 taken overhead. You should be able to explain why these trails 

 are not alike. 



2. WHAT Is YOUR SPEED AND WHERE ARE You GOING? 



In addition to considering and making the calculations sug- 

 gested here, ask members to look up and report to the club any 

 information facts or theories that has to do with our move- 

 ments in space. 



a. If you were at the equator, how far would the rotation of the 

 earth on its axis carry you in twenty-four hours? 



6. If you were right over the North Pole of the earth, how far 

 would the rotation of the earth carry you in twenty-four hours ? 



c. If you live about halfway from the North Pole to the equator, 

 how far will you travel in twenty-four hours? 



d. If you are moving at the rate of eighteen and one-half miles 

 per second, along the orbit of the earth around the sun, how many 

 miles do you travel in a day of twenty-four hours ? 



3. Make a star map for the present month. 



4. Make a simple telescope. 



5. Report on the beginnings of astronomy. 



6. Report on a modern astronomical observatory. 



REFERENCE READING 



Baker, R. H., The Universe Unfolding, Williams and Wilkins, 1932. 



Barton, S. G., and Barton, W. H., A Guide to the Constellations. Mc- 

 Graw-Hill, 1928. 



Book of Popular Science. Universe, page 453 ; Motion, page 871 ; 

 Worlds, page 1305 ; Star Land, page 4167 ; Milky Way, page 4767. 



Chant, C. A., Our Wonderful Universe. World Book, 1929. 



Moseley, E. L., Other Worlds. Appleton-Century, 1933. 



Washburne, H., and Reed, F., The Story of Earth and Sky. Appleton- 

 Century, 1933. 



