Impumelelo yesayensi ngokuya ngesikhala sokufunda umhlaba nendawo yangaphandle inikeze ubufakazi obuningi obukhombisa ukwakheka kwalo okuyindilinga. Ukuba ngaphezulu kweplanethi, ukuzwa ukuthi akunakwenzeka, kanye nenqubo yokujikeleza okungapheli. Yikuphi ukuphakama okungenhla komhlaba kufanele kukhuphuke, ukuze ngamehlo akho ukubona ibhaluni lakhe?
Uhlobo lomhlaba
Ukuchazwa kwendlela yeplanethi yethu kuncike ekutheni kusetshenziswe kanjani umongo. Ngokokwemibono yanamuhla, umhlaba unesimo esiyindilinga, futhi umsakazo wawo ojwayelekile ngu-6371.3 km. Le nguqulo ilungele ukuxazulula imisebenzi lapho ukunemba okuphezulu kungadingeki, ngoba empeleni umhlaba awulona ibhola eliphelele ngokuphelele.
Ezindaweni ze-geodesy and adstronautics, eminye imigomo isetshenziselwa ukuchaza isimo somhlaba (sperroid) ne-gemoid, ngokulandelana. I-sperroid ihlotshaniswa nohlelo lwezixhumanisi ze-geodesic, ezisetshenziselwa ukunquma indawo yezinto ezisendaweni yomhlaba.
I-Geoid yifomu izwe elizoba nalo, limbozwe ngokuphelele ngamanzi olwandle nethonya leminye imizimba yasezulwini. Eqinisweni, indlela yeplanethi ivame ukuphambuka ku-geoid, noma kunjalo, isethulo esinjalo sisetshenziswa ohlelweni lokudidiyela izinkanyezi, navigation kanye nezinye izindawo. Mayelana ne-GEGOID RAPE, ukuphakama kwenziwa ngaphezu kwezinga lolwandle.
Iqiniso Elithakazelisayo: Ngo-1956, uSamuel Scateton wadala umphakathi we-pseudo-social inhlangano yamazwe omhlaba. Abasekeli bakhe baphikelela emcabangweni wokuthi izwe elisesimweni lifana nediski elisicaba, futhi noma yibuphi ubufakazi bokuphambuka buhambelani neqiniso.
Yikuphi ukuphakama ongakubona ukuthi umhlaba uyindilinga?
Imicabango yokuqala yokuthi umhlaba unesimo esiyindilinga, kwakusekhona izazi zefilosofi zasendulo zamaGrikhi ekhulumeni leminyaka ye-VI. e. Ikakhulu, kuthiwa yiPythagora neParmeno. Ukucabanga ukuzinikela isikhathi esiningi ukucabanga ngesibhakabhaka sasebusuku, njengendlela kuphela ngaleso sikhathi, indlela yokufunda isikhala yayisetshenziswa, futhi izindlela zokubala zejometri zazisetshenziswa.
Babona ukuthi isikhundla sezinkanyezi esibhakabhakeni siyashintsha. Uma iplanethi ibiyisicaba, khona-ke kusuka kunoma yiliphi iphuzu lomphezulu wayo kungenzeka ukuthi kubonakale izinkanyezi ezifanayo. Isibonelo esicacile kunazo zonke ibhere enkulu, okungenakwenzeka ukubona, ukuba ngaphansi kwama-25º naku-Latitude.
Enye into ethokozisayo ebhalwe ngu-Aristotle yi-shintshar exsulayo. Kufika lapho iplanethi yethu itholakala phakathi kwelanga nenyanga, isivala kusuka ekukhanyeni. Ngasikhathi sinye, i-satellite ivela kuCone yesithunzi eyehla ngomhlaba. Isimo sokuma esiyindilinga esihlukile siwela enyangeni.
Ukuze ubone ngamehlo akho ngomhlaba oyindilinga, kudingeka ukhuphuke endaweni ethile. Izimpawu zokuqala zefomu eliyindilinga zingabonakala ngokuba ngaphezulu kwentaba ephakeme (cishe ngo-6000 m). Ngokubukeka, umkhathizwe usazobonakala ebushelelezi. Kodwa-ke, isithombe esithathwe ekuphakameni okunjalo sizosiza ukubona izimpawu ezincane - kwanele ukuzama ukuhlanganisa umugqa oqondile nomugqa oqondile oqondile.
Ngokusho kocwaningo olwenziwe, umhlaba wejika ubonakala endaweni ephakeme ka-10 000 m. Kepha ngasikhathi sinye, okubukelekayo kufanele kube nokubuka konke okungama-60º. Ngeshwa, ukuhlala endizeni yabagibeli, ekhuphuka ngokwesilinganiso ukuphakama okunjalo, ayinikezi isibuyekezo esanele. Ukuze ubone ngokucacile ukwakheka kweplanethi enkulu kakhulu, kuyadingeka ukundiza ngo-18-20 km ngaphezu kobuso.
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