"4 



THE GUIDE TO NATURE 



the sun and is growing perceptibly 

 brighter. Unfortunately, however, il 

 is also moving rapidly southward 

 among the stars so that it continues to 

 set about two hours after sunset dur- 

 ing the entire month. It is a beautiful 

 object as it shines in the twilight glow 

 and will well repay examination in the 

 telescope. 



Figure 2. Region between Cygnus and Aquilla. 

 Each star marked D is a double: a cluster will be 

 found at each point marked C and a nebula at each 

 point marked N. Stars which vary in brightness are 

 marked V. 



Mars is a morning star, seen far in 

 the northwest for about two and one- 

 half hours before sunrise on September 

 I, and this time is increased to four 

 hours by the end of the month. The 

 planet in its rapid eastward motion 

 will pass the faint and distant Neptune 

 on September 22 at ^ A. M. (Eastern 

 Standard Time). The latter planet 

 may conveniently be found on this 

 morning by first turning the telescope 

 on Mars and afterward depressing it 

 exactly 1 degree 18 minutes to the 

 south. 



Jupiter is moving slowly eastward 

 and nothward in the constellation Tau- 

 rus. Throughout the month it will be 

 found almost exactly north of the star 

 Aldebaran.of the Hyades and eastward 

 of the Pleiades. This part of the sky is 

 thus rendered unusually brilliant and 

 attractive at present, but unfortunately 

 it is just beyond the borders of our 

 evening map. Toward midnight, how- 

 ever. Jupiter is high in the northeast- 

 ern heavens- 



On the morning of September 4 Ju- 

 piter's second moon will reappear from 



eclipse at o hr. 35 min. 32 sees. (East- 

 ern Standard Time) ; it will next dis- 

 appear behind the planet at o hr. 50 

 min. 40 sees., and will finally reappear 

 at 1 hr. 18 min. 26 sees. Similar phe- 

 nomena may be witnessed on the morn- 

 ing of September 11, beginning at c 

 hr. 7,^ min. A. M., while on disappear- 

 ance into occultation. and the ecliose 

 of the first moon may be seen, the phe- 

 nomena beginning at o hr. o min. 12 

 sees. A. M. 



Saturn is found in the northeastern 

 heavens in the early morning. On Sep- 

 tember 1 it lies about one hour to the 

 east of Mars, but the latter planet rap- 

 idly overtakes it. On October 1 at 7 

 A. M. Mars will pass to the east of 

 Saturn ; the two planets will then ap- 

 pear separated by a distance slightly 

 greater than the apparent distance 

 across the moon. 



On September 23, at 10 hrs. T min. 

 A. M. (Eastern Standard Time), the 

 center of the sun will cross the Celes- 

 tial Equator; at this instant summer 

 will end and autumn will begin. On 

 September t, at to hrs. 53 min. A. M. 

 our irregularly moving sun will be in 

 such a position among the stars that 

 at that instant sundial time will coin- 

 cide with local mean (or "watch") 

 time. As astronomers express it, at 

 this instant the "Equation of Time" 

 will be zero- 



The ninth satellite of Tupiter, reports 

 the Mount Wilson Observatory, is 

 probably about fifteen miles in diame- 

 ter. Its period of revolution about the 

 planet is seven hundred and forty-five 

 days. 



There is no more lonely worship of 

 God than that for which no image is re- 

 quired, but which springs up in our 

 breast spontaneously when nature 

 speaks to the soul, and the soul speaks 

 to Nature face to face. — Goethe. 



To the undevout, Nature is simply a 

 workshop ; to the Christian, it is a 

 voice ; to the Saint she opens at once 

 the inner chamber of her most hallowed 

 mysteries and tells of the goodness and 

 greatness of her Creator God. — H. C. 

 McCook, D.D. 



