I-Analemma

indawo yelanga enyakeni

Ukuba siqwalasela ilanga yonke imihla ngexesha elifanayo emva konyaka wonke siya kubona indlela, ngokuphakamisa iifoto, lenza imilo ye-8. Oku kwaziwa ngokuba i-analemma nokuba kungenxa yokuthambekela kwe-axis yoMhlaba kunye nokuguqulelwa koMhlaba kwi-elliptical orbit kancinane.

Kweli nqaku siza kukucacisela ukuba yintoni na into eyaziwa ngokuba yi-analemma, iimpawu zayo kunye nokubaluleka kwayo.

Yintoni i-analemma

imilo yelanga

I-analemma ligama elithi Isetyenziswa kwi astronomy nakwi geography ukubhekisa kumfanekiso okwimilo yesibhozo (8) eyenziwayo xa iindawo zeLanga esibhakabhakeni zirekhodwa ngexesha elinye lemini nakwindawo enye ekuhambeni konyaka. Le pateni yesibhozo ibangelwa kukuthambeka kwe-axis yoMhlaba kunye ne-elliptical orbit ukujikeleza iLanga.

I-analemma yenziwe ngamacandelo amabini aphambili: icandelo elingasentla kunye necandelo elisezantsi. Icandelo elingasentla liphezulu "kwesibhozo" kwaye libonisa izikhundla zeLanga ngexesha lentwasahlobo kunye nehlobo lasehlotyeni kumantla e-hemisphere, xa iLanga liphezulu esibhakabhakeni. Inxalenye esezantsi, ngakolunye uhlangothi, ihambelana nexesha lasekwindla kunye nobusika kwindawo esenyakatho ye-hemisphere, xa iLanga lisezantsi esibhakabhakeni.

Esi siganeko sisiphumo sokudityaniswa kweentshukumo ezimbini zoMhlaba: ukuthambeka kweaxis yawo kunye ne-elliptical orbit yayo ukujikeleza iLanga.Ukuthambeka kwe-axis yoMhlaba kubangela ukuba iLanga libonakale kwindawo ezahlukeneyo esibhakabhakeni unyaka wonke, logama i-elliptical orbit ibangela ukuba uMhlaba uhambe ngesantya esahlukileyo kwi-orbit yawo, ekwachaphazela indawo ebonakalayo yeLanga.

I-analemma yimzobo emele i-equation yexesha, engumahluko phakathi kwexesha lokwenyani lelanga kunye nexesha elithetha ilanga. Lo mahluko ubangelwa kukuba i-orbit yomhlaba ayikho setyhula ngokugqibeleleyo, kwaye isantya esihamba ngaso ukujikeleza iLanga siyahluka unyaka wonke. Ke ngoko, i-analemma yindlela ebonakalayo yokubonisa ukuba ixesha "lokwenyani" lelanga linokwahluka njani xa lithetha ixesha lelanga unyaka wonke.

Imbali ethile

umlinganiselo we-analemma

Sele kumaXesha Aphakathi kwaba yimfuneko ukumisela ixesha iequinox ukumisela iequinoxes yokuqala, yaye kulo nyaka [1475] Paolo del Pozzo Toscanelli kubalwa ubeko lokuqala meridians, nto leyo engazange ibonelele kuphela iziganeko zasemini ngokuchaneka okukhulu. , kodwa Kwakhona kunokwenzeka ukumisela ixesha lonyaka.

Le meridian yakhiwe kwiCathedral yaseSanta Maria del Fiore eFlorence, eItali. Imeridian yayakhiwe ngemicu yebhastile emgangathweni kwaye kwasikwa umngxuma kudonga olusemazantsi ukuvumela indawo ekhanyayo ukuba idlule kuyo ukubonisa umhla wonyaka kwisikali. Le nkqubo yokwenza i-meridian yaziwa ngokuba yi-analemma.

Inkqubela phambili yoomatshini ngenkulungwane ye-XNUMX yenza iiwotshi zoomatshini zachaneka ngakumbi, kwaye ngokufika kwewotshi ye-pendulum kwaba nokwenzeka ukulinganisa imizuzu ngokuchaneka okukhulu. Kweli nqanaba umahluko phakathi kwexesha lelanga elilinganiswa ngeesundials kunye nexesha loluntu elilinganiswe ngoomatshini ngamawotshi aqhelekileyo omatshini aqala ukubonakala, anikezelwa yi-equation yexesha. Mhlawumbi kwakumalunga nalo mhla apho igama elithi analemma labhideka, lisuka kwinkqubo yolandelelwano lwamaxesha ukuya kumelo kwindawo yegraphic.

Umzekelo olandelayo

i-analemma

Ngenxa yokuba i-axis yomhlaba ithambekele kwi-engile ye-23,4 degrees, Indawo elikuyo iLanga esibhakabhakeni ibonakala itshintsha njengoko uMhlaba ugqibezela ukujikeleza kwawo iLanga. Njengoko uMhlaba ujikeleza iLanga kwi-axis yalo ethambekileyo, indawo elikuyo iLanga esibhakabhakeni itshintsha-tshintsha inyuka isiya kuMntla-Mazantsi. Oku kubangela ukubunjwa kwepatheni-8 equkethe iilophu ezimbini.

Ngexesha lasehlotyeni, inxalenye ephezulu ye-analemma yenzeke. Njengoko ihlobo liqhubela phambili, iLanga ngokuthe ngcembe linyukela phezulu esibhakabhakeni kwaye ekugqibeleni lifike encotsheni yalo ngexesha lenjikalanga yehlobo. Emva kwe-solstice yasehlotyeni, indawo ebonwa yiLanga iqala ukuhla kwayo esibhakabhakeni, ivelisa i-loop yokuqala kwipateni. Le nto iphinda iphindwe kwakhona kwixesha lasebusika, okukhokelela ekudaleni i-loop yesibini kwi-trajectory yesibhozo.

Ukucinga ukuba i-orbit yomhlaba yayiyi-elliptical, kodwa Ngaphandle kokuthambekela kwe-axial, i-analemma yelanga iya kuthatha i-oval shape. I-analemma, ebonwa kwi-ikhweyitha, iyakuba ngumgca othe tye ohamba ngokuthe tye ukusuka entshona ukuya empuma.

Kwimeko apho umjikelo woMhlaba ubusetyhula, ukuthambeka kwawo kwe-axial kuya kuvelisa igophe le-analemma elingumfanekiso-8 elilungelelene ngokugqibeleleyo ngobukhulu kuzo zombini iilophu zawo eziphezulu nezisezantsi. Nangona kunjalo, oku akusiyo umboniso ochanekileyo. Umjikelo womhlaba I-elliptical kwaye iLanga alikho embindini kwindlela yalo. Oku kungangqinelani kukhokelela kwindawo enye kwindlela, ebizwa ngokuba yiPerihelion, ekufutshane neLanga kunenye indawo, ebizwa ngokuba yiAphelion.

Yenziwa njani i-analemma

Isantya sokujikeleza koMhlaba kwiLanga siyahluka ngokuxhomekeke kwindawo ekuyo kwindlela ejikelezayo. Xa iplanethi ikwindawo yayo ekufutshane neLanga, eyaziwa ngokuba yiperihelion, leyo kwenzeka malunga nenjikalanga yasebusika, ihamba ngesantya esikhawulezayo. Ngokwahlukileyo koko, xa uMhlaba ukwindawo yawo ekude kakhulu ukusuka eLangeni, iAphelion, uhamba ngesantya esiphantsi. Lo mcimbi ukhokelela kwisiqingatha esisezantsi esisicaba segophe.

Ijika le-analemma libonisa ipateni eyahlukileyo phakathi kwe-hemispheres esenyakatho nasezantsi. KuMntla weIkhweyitha, umzantsi wegophe wenza eyona loop ibanzi, ngoxa kuMazantsi eIkhweyitha, umphezulu wegophe wenza eyona loop ibanzi.

Abo bajonga i-analemma kwi-North Pole baya kungqina kuphela i-curvature ephezulu, ngelixa abo baseSouth Pole baya kubona kuphela inxalenye engezantsi ye-Analemma. Kufuneka kuqatshelwe ukuba ukuqhelaniswa kwe-analemma kuya kutshintsha ngokuxhomekeke kwindawo ethile yombukeli kumhlaba womhlaba. Isijikelezi-langa ngasinye kwisixokelelwano sethu selanga sine-analemma yaso.

Ndiyathemba ukuba ngolu lwazi unokufunda ngakumbi malunga ne-analemma kunye neempawu zayo.


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