| Show QUEER TRICKS OF THE MOON AND STAS STARS with a L little ittle close watching many wonders can be seen in the the night sky the night dlhy ly Is full of won wonders dersI and tofi of 0 tile the simp simplest leRt things filings to be men here ire are most interesting it la Is not 0 try iry to bo be nn an astion orner to find d pent in ill the stars inra sill aft that la is IV it in to match ath cloudy closely with eyes iari lit open ind the int rid aldi aa any bright boy or girl nho mho ill 11 devote a few minutes minute to this pleas lit 11 i ailt k eiery ciry hoar clear summer evening fill be limply amply it Is 13 well worth anil and a few hints as to some of 0 th ili ihl iii yim may expect to A ace 00 11 will I 1 li in fit laiful for example let irl suppose that you iti ill gazing up at tile the moon in tho the phase haw h n it forms forma that beautiful crea crescent cent illitch has hern been arrogated by the moslem 1 hla big chosen emblem near it no the alic onca or In curving side aide glim app oica I 1 i blight star and this striking combination at once arre arresta ats lour our attention light necey fleecy clouds are arc bearing tops the sky eky end tho the moon it first glance to bi be charging paugh theral rt fit griat euceil hut but you it ini p rc wl evv ihil big Is an illusion f iti ill bright star and all the other kp k p in the barne relative tinn vy ly holding UP your hand find and I 1 taig line it ir r it you can at once corth carth f t ise impression for the moon ali it the iho clouds still po go sliding by I 1 then you observe that the moon nu very try tic near r it actually appears u b bacur rig through the clouds clour lB for mi in of ham them cross its face oth vi rf loom lom behind it 11 of course you do not lot rae ned d to bp be told that illis alk to ie another but you may be b puzzled to t ne ac anit for it the i phonation phi nation how c r i ver ample some portions or h loial loi nl her arr ito thin find cabay that it ao 20 do not show at all iho h brigit 1 tafv tp of the moon though ti they ey il our auf att and aal folami agal list lh dark background of the iho sky ta elioso ose Z 4 Z filing ellms therefore appear to 4 h the luminary which zeally through them chile the heavier cloud mosses obscure the agit fight and arft are S aen erl ill theli proper position pogi iLlon still another MUS illusion of motion the 1110 slow alow in matth arch of the moon anti anil the n hole holc army or altars toward the west la Is too loo wr w for comac nt all a that keg ex to lo us when we welt voy vely little rut nut all at once we w perc perceive elve that something is ia going on chich chows a areld motion on the part of tile I 1 lie the bright star alrh first attracted our n otice Is peret atil 1 nearer to the aln shin ing wo we imagine that lit in ft a few it ull be right the th talpa as coleridge wrote in the liral first edition or of his hia ancient milliner Mail nr though aft after r ho he hold had 01 the phenomenon 0 ate o tire now to lc lie he saw flaw lit fit to change the linw lint a lit hatte lie bk sharp or oi you hlll ill it why the atar has bus pone izone out jt it ties has vanished hed all a if si a dark shutter had bad been hot over it ft by the passing ff of boyne wasef n button billion ani that Is pretty uy nearly ahat hat has haa the lie daik shutter being the ind and invisible portion of oc the timor lunar di uk dir R us ax like creeps in th ill monthly circuit tho eky arky 17 ian ianes ancs ps i ar after star along its ll 11 puth path cutting orr their light aith lah bartlin tart lin this Is ea to find nhen athen the at t tor p r thur thu ob lit JH a brilliant one it Is A very impre ove thing io 0 o see sec for the stellar radiance Is quenched as is sud dewy as aben ft hen a park bpark t falls on mater find and without any visible isible cause though hen tile the crescent t la a quite qu lie thin a you may see lite shado shadowed iNed por par 1111 of the alk in dlin dim outline by tile the light from tile the earth which as a huge moon to Us its own satellite the hidden star of course reappears after it time just its aa as it vanished aloot of tho t thus thua extin gulshen by the moons black shutt tT aro are w fiat we call fixed stars stara so inconceivably i remote that they appear an aa more mere points of oc light lusht and never chanko change their relative positions in any perceptible degree in that case although tile the moon and the star appear to stand side file hy by ride the star Is really many bundled million times more inore CIN tant ant proportionately innately Iona telY RS as far beland the moon as the moon itself is 1 beyond a pea hold held up tip between your fingers lit at arms length put dut wis as tho the star we live have been batching Vat ching way was exceptionally I right it may hane hac been a planet to det cimine this it 11 hilll ll bo be necessary to keep civick ot of it ft for fir several evenings carefully note noi its ha with willi to the astound it do the same tomorrow night and I 1 he light if you fill and that out our star alar N f slowly moving neross the background formed hy by tho the fixed stars it Is undoubtedly a planet jt it la a extremely to follow chrt course e of a planet from night to night and to let traces iraco it in dew 11 upon AL a 10 celestial son ora atlas ra or blei globe glob if you 10 lo this or r A considerable ld e time 1 you will find to ra your u r surprise that its I 1 rat is neither r sk all night dor doe uniform h hut at hat ba ka its and fill filli and halts anti ami da forward looping I 1 and twisting in I 1 lift lie most unexpected od mano manoler lir yec see ila ig 2 it was vas in consequence 0 oc II 11 these fcc eccentric e movements n that hat I 1 the planets their name which means wanderers wan derera I 1 they y fire arc thi ilia tramps of the sky yet this IN reproach seems hardly title for in poi point t of 0 fact they filow f ilow no such tor U ou track they simply circle around I 1 th thu bun just like tile tho eadith and their appi trent movement called call fil i it in only another of 0 those hios optical illusions of astronomical trono mical ical seem to be arnony mali ma d d ur up for scarcely anything ag aa it really Is even through a I 1 telescope C this misleading and seemingly eem uncalled for exhibition on the i part ot of our steady boling planets is rather difficult to explain without le bc co mining excessively technical but the following illustration ettl I 1 think en cn EL blo you to understand the principle involved at least let an island in tho the middle of a 01 lake lak see ape fig 1 represent thi the sun at the center of 0 lla its round around it at a moderate cIN distance tance moves a steamship representing tile tho earth coursing along ats orbit outside fu tre of this in oving in ill the sami same direction but more sloay slid mid jn in a linger circle la 19 a 11 salting ship representing the planet mars N ars the distant shore or responds to in ih fixed stars atara practically motionless the lines numbered num bared 1 2 3 etc show tile the line fine of ight at successive as aa one CIVIC looks flown lite at teamer earner 11 farih 11 ith piat past tile the ship afara to 0 tile tho shore it if you bolln the figures fifth show allow where these lines strike ohp lh hench beach you i mill III see that thai N ahen hell the lh earth boat is approaching the point called opp opposition altion filere herc ll it nearest the martian filgate the latter mill fr for a time seem to slide fl cafio Z 3 J r 31 4 1 5 F A b IL f i is I 1 I 1 it 6 huk waid as M viewed against lie hie shore horo w as a background backs round though both bolh vessels are arc mcahy moving lit in the same direction lines 1 1 2 3 4 than mars will appear b to folge a abed very rapidly 4 t 5 6 etc do and this will continue until the vessels are arain in tile the sam p position 0 littion 1 which will wil I 1 be ihen hen karth earth h lias ns anio more 0 overtaken make find and Is IB I 1 in n the act of passing in fig IB tile the planets thom ore are shown moving i in n t the h a s asame a m manner r n A n n e r N with I 1 I 1 h t iho h a if fixed x e d 0 baars blars t A r s t as I 1 a a b et c k g r 0 u n d in the case of a planet the th orbit of oc which la Is inside that of the earth the positions are in general te versed but the result lg is similar this you can proe by constructing a diagram for yourself on the same plan its fi that given for mars but you will that the backward occurs apar the point where tile the planet pitie between the earth anti the pun film went Is calam inferior conjunction or 0 tho two ln in fez feidor for planets pl aneLs venua laehy ef tell rec as the evening star raould be aho bo sen ben for purposes pur pos of brer lor cury is IQ too faint ind keeps too to near the sun gun even venus at the th time lime of its is retrogression aloa and owns ta so neady with the sun flun that it Is 13 not easy to follow its movements venus however la Is an extremely interesting te star filar to watch though sho she can only bo be seen for a short hort time after sun aun bet or before sunrise that of course iq 19 because hr her circuit Is 1 so much smaller 0 r than ours num that sho she can nover never pet get very far from tile tho sun with lit the e help of a ROOI good fjeld glass you can easily coolly ye e that she bho shows phases pleases ases lust just like tho the moon and mia bho la Is at all times A beautiful object well worthy of 0 her hor her variations in brightness nevertheless fire are cot extreme find and oddly enough it ft la Is neither when she Is 1 full nor ye yot t when she la Is nearest us that sh gives most mont light the reason ta is that N when lien she li 19 fit at full she ehe Is 3 most distant vie fig aa and consequently appears very small while when she comes clos clo esl if visible at all she ahe appears as it ft mero crescent threat thread like the new moon fix ac so it Is when she pho la IS near neap the fig SH that she Is most hi illiana Illi ant and nl ILL such euch times it th ahr so night Is 14 perfectly clear her light Is ili so intense that site she casts EL a perceptible shadow all these are arc very simple and familiar matters but it if you will take my od ire fo arid and spend half an all hour each even tars in keeping arnn glosto watch upon the stars you will not only be giving your gelf much pleasure but tin an excellent training of both bolh mind one and eyo py LAWniN Cn bronil Cory cortright right ISM sli hy by tile hie international literary and news Sorl Serl cel cc fio 4 MOO SUN W Z earam rig 1 A diagram to illustrate io motion of 0 pla nota ts the island represents the sun the tile the earth the salting sailing ship mars the shoie shake the background of stars B Thos amein outline rig fig 2 Appa apparent reut movement of planets in setrog fig 3 appearances of venus A when most distant B when brightest C when neni cst rigl A apparent position of moon and star just before occula occultation tion B real position of the moon and star nt at the same moment |
