Ukukhanga Okudonsela Phansi Phakathi Kwamaplanethi: Umdanso Wendawo Yonke
Kusukela ekufinyeleleni okuthule kwesikhala sangaphandle kuya ezingxenyeni eziminyene zemithala, amandla adonsela phansi abusa kakhulu—amandla adonsela phansi. Abonakala ngokukhangana okuhlangene phakathi kwezinto ezinobunzima, amandla adonsela phansi angumakhi wemidanso yasezulwini, elawula ukuzungeza kwamaplanethi futhi ebumba isakhiwo sendawo yonke. La mandla angabonakali kodwa akhona yonke indawo adlala indima ethakazelisayo kakhulu ekubuseni ukusebenzisana phakathi kwamaplanethi. Ukuqonda ukukhangana okudonsela phansi phakathi kwamaplanethi kunikeza ukuqonda okujulile ngokusebenza okuyisisekelo kwendawo yonke yethu.
Umthetho Oyisisekelo Wamandla Adonsela Phansi
Enhliziyweni yokukhanga amandla adonsela phansi kukhona umthetho ka-Isaac Newton womhlaba wonke wamandla adonsela phansi, owavezwa ngekhulu le-17. Ngokusho kukaNewton, amandla adonsela phansi phakathi kwezinqwaba ezimbili alingana ngqo nomkhiqizo wezinqwaba zazo futhi alingana ngokuphambene nesikwele sebanga elizihlukanisayo. Ngokwezibalo:
\[ F = G \frac{m_1 m_2}{r^2} \]
Lapha, \(F\) amandla adonsela phansi, \(G\) yi-consistent yamandla adonsela phansi (\(6.67430 \times 10^{-11} \, \text{m}^3 \text{kg}^{-1} \text{s}^{-2}\)), \(m_1\) kanye \(m_2\) yizinqwaba, kanti \(r\) yibanga eliphakathi kwezikhungo zazo zesisindo.
Le fomula elula nenhle ihlanganisa umongo wokukhanga kwamandla adonsela phansi, iyiqiniso ekusebenzelaneni kokubili ezikalini zomhlaba nezendawo yonke.
Ukusebenzisana Kwamandla Adonsela Phansi Esistimu Yelanga
Ukuze siqonde ngempela ukukhanga okukhona phakathi kwamaplanethi, umuntu akadingi ukubheka kude kunesimiso sethu selanga, ilabhorethri yasezulwini esebenzisana nokusebenzisana. Iplanethi ngayinye inamandla okudonsela phansi kuwo wonke amanye amaplanethi, umphumela wayo uwuhlelo oluyinkimbinkimbi, kodwa oluhlelekile, lwemizila kanye nokunyakaza.
Isibonelo, cabanga ngoMhlaba neJupiter. Amandla adonsela phansi eJupiter, yize engabonakali ebangeni elingamakhilomitha ayizigidi ezingu-778 ukusuka eMhlabeni, adlala indima ebalulekile ekuzinzeni komjikelezo woMhlaba ngisho nokuthambekela kweplanethi yethu. Naphezu kwalokhu kudonswa kwamandla adonsela phansi phakathi kwamaplanethi, ukukhanga kwawo okunamandla kakhulu elangeni kuqinisekisa ukuthi ahlala emijikelezweni ebikezelwayo, e-elliptical.
Ukuphazamiseka Nokunyakaza Kweplanethi
Esimisweni selanga, ukusebenzisana kwamandla adonsela phansi phakathi kwamaplanethi kubangela ukuphazamiseka—ukuphambuka okuncane emizuliswaneni yawo eqondile ye-elliptical. Lokhu ukuphazamiseka kubalulekile ekuqondeni kahle kwemishini yasezulwini futhi yisona sizathu esenza amaplanethi angalandeli imizuliswano ephelele ye-Keplerian. Ithonya lamandla adonsela phansi kwamanye amaplanethi libangela ukuba ama-node aqhubeke futhi imizuliswano ishintshe ngobukhulu nesimo.
Esinye sezibonelo ezidumile kakhulu zalesi simo ukuphazamiseka kweNeptune ekuzungeni kwe-Uranus. Ngisho nangaphambi kokuba iNeptune itholakale ngo-1846, izazi zezinkanyezi zaphawula ukuthi i-Uranus iphambukile endleleni yayo eyayibikezelwe, okwaholela ekucabangeni ukuthi kukhona into enkulu engaziwa. Lesi sibikezelo esiphumelelayo sagcizelela ithonya elijulile lokuphazamiseka kwamandla adonsela phansi ekusebenzeni kwasezulwini.
Amandla Okubuyisana Nama-Tidal
Ukukhanga kwamandla adonsela phansi kubonakala futhi ekuphendukeni kwe-orbital kanye namandla olwandle, okwengeza izendlalelo ezengeziwe ku-dynamics eyinkimbinkimbi phakathi kwamaplanethi. Ukubuyela emuva kwe-orbital kwenzeka lapho imizimba emibili ejikelezayo inethonya elijwayelekile, eliphindaphindwayo lamandla adonsela phansi komunye nomunye. Isibonelo esiphawulekayo ukuzwakala kwe-Neptune ne-Pluto okungu-2:3, lapho kuzo zonke iziyingi ezimbili ze-Neptune, i-Pluto iqeda iziyingi ezintathu. Ukubuyela emuva okunjalo kuzinzisa iziyingi isikhathi eside, kuvimbela ukuhlangana okuseduze kanye nokushayisana okungenzeka.
Amandla olwandle avela ekujuleni kwamandla adonsela phansi—umehluko emandleni adonsela phansi ngaphezu kobukhulu bento. Lawa mandla anesibopho sokukhiya kolwandle, lapho isikhathi sokuzungeza komzimba womunye sihambisana nesikhathi sawo sokujikeleza, okubangela ukuba ubonise ubuso obufanayo komunye umzimba. Ukujikeleza okuhambisanayo kwezinyanga eziningi, okuhlanganisa nenyanga yethu, kuwumphumela oqondile wokuxhumana kolwandle.
Ezimweni ezimbi kakhulu, amandla olwandle angaba namandla kangangokuthi aphazamisa imizimba yamaplanethi. Isibonelo, insimu enkulu yamandla adonsela phansi yeJupiter yenza inyanga yayo i-Io ikwazi ukuguquguquka kolwandle, ifudumale ingaphakathi layo futhi ibangele umsebenzi omkhulu wentaba-mlilo.
Usizo Lokudonsa Amaplanethi
Ezingeni elingokoqobo, ukukhanga okudonsela phansi phakathi kwamaplanethi kuye kwasetshenziswa ekuhambeni emkhathini phakathi kwamaplanethi. Ukusiza okudonsela phansi noma ama-slingshots kusebenzisa ukunyakaza okuhlobene kanye namandla adonsela phansi kwamaplanethi ukushintsha indlela kanye nesivinini sendiza ngaphandle kokusebenzisa uphethiloli owengeziwe. Ngokuhlela ngokucophelela indlela yendizamkhathi, abahleli bemishini bangandisa ijubane layo, okwenza imisebenzi yokuhlola ifinyelele ezindaweni ezikude ngempumelelo enkulu. Imisebenzi ye-Voyager iyizibonelo ezinhle zale ndlela, njengoba ivakashele ngempumelelo i-Jupiter, i-Saturn, i-Uranus, ne-Neptune ngokusebenzisa usizo oludonsela phansi.
Ukukhubazeka Kwamandla Adonsela Phansi kanye Nesiphithiphithi
Nakuba amandla adonsela phansi angaholela ekuhlanganeni okuvumelanayo, angabangela nokuziphatha okuxakile. Ngesikhathi eside, ukusebenzisana kwamandla adonsela phansi phakathi kwamaplanethi kungaholela ekungazinzini nasekuzuleni okungalindelekile. Uhlelo lwelanga, nakuba luzinzile kakhulu, lunezici ezixakile ezicashile. Ukuphazamiseka okuncane kunganqwabelana eminyakeni eyizigidi, okuholela ezinguqukweni ezibalulekile ekumisweni kwe-orbital.
Ucwaningo lwalokhu kungazinzile kwamandla adonsela phansi lusiza izazi zezinkanyezi ukuqonda izinguquko ezingaba khona esikhathini esizayo emizuliswaneni yamaplanethi. Isibonelo, ukulingisa kusikisela ukuthi umjikelezo weMercury ungase ube yinto engavamile kakhulu phakathi neminyaka eyizigidigidi eziningana ngenxa yokuphazamiseka kwamandla adonsela phansi, okungenzeka kuholele ekukhishweni kwawo ohlelweni lwelanga.
Ngale Kwesistimu Yelanga
Ukukhanga okudonsela phansi phakathi kwamaplanethi akugcini nje ohlelweni lwethu lwelanga. Ama-exoplanets azungeza izinkanyezi ezikude ahlanganyela ekusebenzelaneni okufanayo okudonsela phansi, embula ulwazi mayelana nobuningi bawo kanye nezakhiwo zawo zokujikeleza. Ukwehluka kwesikhathi sokuthutha (i-TTV) kanye nezindlela zejubane le-radial zibona ama-exoplanets ngokubheka imiphumela yamandla adonsela phansi ayenza komunye nomunye noma ezinkanyezini zawo ezihlala kuwo.
Ukutholakala kwezinhlelo zamaplanethi amaningi, ezinye ezinemizila ezungezayo eqinile, kuyinselele ukuqonda kwethu ukwakheka kwamaplanethi kanye nokuziphendukela kwemvelo. Ukusebenzisana kwamandla adonsela phansi kulezi zinhlelo kuthonya izakhiwo zazo zemizila, okwakha ukuzinza kwazo kwesikhathi eside kanye nokuhlala kwazo okungenzeka.
Isiphetho
Ukukhanga okudonsela phansi phakathi kwamaplanethi, nakuba kubonakala sengathi kuwumqondo olula, kulawula i-ballet eyinkimbinkimbi yezidalwa zasezulwini. Kusukela ekugcineni ukuzinza kwemizila yamaplanethi kuya ekwenzeni kube lula imisebenzi ephakathi kwamaplanethi nokwembula izimfihlo zomhlaba okude, la mandla ayisisekelo ayitshe lesisekelo le-astrophysics. E-tapestry enkulu yendawo yonke, amandla adonsela phansi ahlanganisa imicu, abophe ndawonye izinto eziningi ezakha indawo yonke yethu. Njengoba siqhubeka nokuhlola nokuqonda ukusebenzisana kwamandla adonsela phansi, sithola amaqiniso ajulile mayelana nemvelo yesikhala, isikhathi, kanye nesakhiwo sangempela ngokwaso.
