ANSWERS 



TO THE 



QUESTIONS 



IN THE 



NEW DESCRIPTIVE ASTRONOMY. 



32. 1. Hotv high is the North Star above your hori- 



zon? 



(See Astronomy, p. 218.) 



It should be remembered that the North Star revolves 

 around the true North Pole at a distance of about 1 ; hence 

 it marks the exact height of the Pole above the horizon only 

 twice in twenty-four hours. 



2. What is the sun's right ascension at the autumnal 

 equinox ? At the vernal equinox ? 



At the vernal equinox, the sun is in Aries, and its R. A.=0. 

 At the autumnal equinox, it is in Libra, and its R. A. = 180. 



3. What ^vas the first discovery made by the telescope ? 



(See Astronomy, p. 20 ; articles in Appletons 1 Cyclopedia on Telescope 

 and Gt-alileo ; and, also, Routledge's History of Science, p. 107.) 



Galileo's telescope was constructed on the principle of an 

 opera-glass. 



4. How high above the horizon of any place are the 

 equinoctial points when they pass the meridian ? 



(See Astronomy, note, p. 27.) 

 The co-latitude of the place. 



5. Jupiter revolves around the sun in 12 of our years. 

 Assuming the earth's distance from the sun to be 93,OOO,- 

 OOO miles 9 compute Jupiter's distance by applying Kep- 

 ler's third law. 



(See Astronomy, note, p. 19.) 



