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30 degrees more and you find Spica-- fis, -- cee Hig. 43, ov *x AACTURUS a * . HSHIEA tT ¥ FIG. 43, But there are times when you can- not find either -Arcturus or Spica because. they are below the horizon. The dipper is: there: pain enough but it might be in the position shown in Fig. °44. Follow the dipper handle and you will come to the horizon be- fore recch Arcturis. or. Spica. They will rise later when the dipper rises higher. | | y you HORIZ ON nig. 44. Spica can also be found by ranging across the dipper bowl as shown in Fig. 45. x * kK MOLE ps BO DERRERS 4 os Ca ie a oy fe ay Fic, 45. Pollux. Pollux. is one of the Heavenly * Twins, two stars in the constellation Gemini. The other star is named Cas- tor but we cannot use even though it is so close 'to Pollux. It is just out- "side the belt for which we 'have azi- muth tables. Pollux is shown in Fig. et cas Tor > e wok ake Sip ad "POLLUX FIG. 46. work. "TAE MarINeE. REVIEW 46, but it can be located in another way. Range across the Dipper bowl as shown in Fig. 46. Pollux rises about 30 degrees north of exact east. Altair Altair is seen only in the morning until April 1 when it rises at midnight, It rises about eight degrees north of exact east. We. canont get.a range from the Dipper for Altair but it is easily picked out if you watch the list of times of rising and setting. Altair is the center one of three fairly bright stars. See Fig. 47. Altair is the only very 'bright star in this region iof the sky and you will have no 'trouble in identifying it. "a ALTAIR HIG. 4/7. Altair and its Two Companions. | Before trying to locate any more stars. we, will give the list of times of rising, meridian passage, and setting of our 11 navigational stars in order that we may know just where 'to look for them. This list will tell you just whether the star you wish !to locate. is above or below the 'horizon. The meridian passage means, its pas- . sage over the meridian on which you stand. The sun passes your meridian at noon, by your sun time. The times given here are for the first of each month. Remember that a star rises: four minutes earlier each day. If a star rose at 8 p. m. on the first day of the month it would rise at 7 p. m. on the 15th, etc. In the list you will notice that, in some places, the time is not given.' This is because it either rose or set -in the daytime, when you would snot ibe able to observe it. The rising and setting times of the planets is given farther. along in' this * All .the calculations given in this list were arrived at by computa- 'tion. This list of times of rising and set- ting. of the stars can 'be used for any year. Each star wiil rise next year at the same time that it did this year. But planets will not do so. We must com- pute the times of rising and setting of the planets every year. Therefore the list shown farther along in this work, . giving the planets' movements, is for the present year (1909) only. But after a short time you will be able to locate the planets, each year, without need- veins Mess Sin Time. Rises 1 1 1 ere 'June 1.. ess 1 1 1 iL Mean Sun Time, 'June July 29 ing a-list. As there are only four vis- tble planets in the sky we will not be bothered much by them. Following this list you will fad an- other list 'that gives you the names of the stars you can use each month. Not all 'of our 11 stars can be seen every night in the year. Some of them are above the 'horizon only in ithe daytime, during some months. During June only only five of them can be used while for other months you can use as many as 10. Of course some of them can be used for only a few 'hours after sun- down or just before sunrise while oth- can be seen the whole night through. Our list will show ye that. 'ARCTURUS. Mean Sun Time. Date Rises Jane les Feb. Mar. il 1 Apts se May <1... 1. i 1 iL _ Passes Meridian | ee eee eeeee wee ere tease eee ewe tenes Jane saute ete aes uly Aug. Septal. OC 155 Nov. 1. Dec. 1. Note Bijan spaces: indicate daylight. SPICA. Passes Meridian --- eee ew eee he tt ee et oe ew" id eee 6 ew wie we" © th tr tn tat SDD > DAA ooo 335 I PPP . Date jan: le Feb. ae Mar. Apr. May wee ee ee ene July Aug. Sept. Oct. Nov. 1. : wo. Dec. 1... 3:24 A. M.- Note--Blank spaces indicate' dayligut. ALD EBARAN DAANAAVS: ewe were eee tw eee ee ee Rises eee ete tees Date Jan. Feb. Mar. Apr. May cee e ewe eee eee weet eee ete we we eee cee cece ece eee ee ewww e Aug. 1...12:44 AM. ee eee es vec ee en ne Sept. Oct. Noy. i Dec. M. 11: BY P. M. Note--Blank spaces indicate daylight. RIGEL. weet eneere fos ee re rn ae . . ° ° = . . . . e .. . > . * . . . . . Mean Sun Time. Se Rises Passes Meridian . Se Date » sa =) Jang! 1 20505 PM. 7103 M. 03:57 7A, M. Hebi Wis gra ce ta tae 8:31 P.M... .1:57-A.M: Mears PR ese catia' 6231 P.M; 14:57'P: M. ,GADH: bscie. ees. d¢ r¢ appa 899 SAR ME, May el sg eee a ei eee 2757 Pe oe EFutie SEA es cede tbs i AE ee Nees ed ae July ods Hane es ee vee Auge)... (805 AM oo. tees | astern reese Sept: 1s. "1:05 Al M.. 2c2ue, Or eee es arena ; Oct. (1... 11:05 P, Me. 4:30A Mo o05ssn cen Nov. '12. 9:05 Po Me: 2:31 A. Mio 2. aaa Dec. 1. 7:05 P. Me 12:31 A.M. 5:57 A.M. Note--Blank spaces indicate daylight. BETELGERZ. ee $s nm SuniTimess oh 3G Ce ese ae Rises asses "Meridian Sets _ Jan, 1...04341 ©. ve 'TAS 11 P Ee 5:41 A. M. Feb. fo 9-11 P. 3:41 A. M. Mar." 1 tee ne 711P.M. 1:41A.M. Apia: fete 5:11 P.M. 11:41 P.M. May. Asp once Moree eo SAL Poe, une "Ls wesc es fae oe ae eee eee veeeeaee as lec AALAL Me cries ee Uae bebe e « Aug. Le. QA ACM, oc cesce cere ee pee Vee Sept. "1.. 1241 AM 7 ee ADM. hie He Oct 1. 104t PM 5 1AM eipeeere Nov. 1.. 8:41 P.M. 3:11AM 2), Dec. Les 6: 1P: M. 1:11 A. M. i oo kes bate 4 Note--Blank spaces indicate daylight. ao