Yiziphi izingxenye zomhlaba ezingakwazi ukubona ukushona kwelanga?
Context:Ukushona kwelanga, okwaziwa nangokuthi ukushona kwelanga, kuwukunyamalala kwelanga nsuku zonke ngaphansi komkhathizwe ngenxa yokujikeleza komhlaba. Njengoba ibukwa kuyo yonke indawo eMhlabeni (ngaphandle kwama-pole aseNyakatho naseNingizimu), i-equinox Sun isetha entshonalanga ngesikhathi sokuqalwa kwe-equinox yasentwasahlobo neyasekwindla. Njengoba ibukwa iNyakatho Nenkabazwe, iLanga lishona ngasenyakatho-ntshonalanga (noma lingashoni nhlobo) entwasahlobo nasehlobo, naseningizimu-ntshonalanga ekwindla nasebusika; lezi zikhathi zonyaka ziphendukezelwe eNingizimu Nenkabazwe. Isikhathi sokushona kwelanga sichazwa ngokwesayensi yezinkanyezi ngokuthi yisikhathi lapho ingxenye engenhla yeLanga inyamalala ngaphansi komkhathizwe. Eduze nomkhathi, ukuphazamiseka komkhathi kubangela ukuba imisebe yokukhanya kwelanga iphendukezeleke ngezinga lokuthi ngokuma kwejometri i-solar disk isivele inobubanzi obungaphansi komkhathi lapho kuqashelwa ukushona kwelanga. Ukushona kwelanga kuhlukile ekuntweleni kwelanga, okuhlukaniswe izigaba ezintathu. Eyokuqala iwukushona kwelanga, okuqala lapho iLanga selinyamalele ngaphansi komkhathizwe, futhi iqhubeke kuze kube yilapho selehlile ku-6 degrees ngaphansi komkhathizwe. Isigaba sesibili siwukushona kwelanga, phakathi kuka - 6 no - 12 degrees ngaphansi komkhathizwe. Isigaba sesithathu siwukushona kwelanga okungokwesayensi yezinkanyezi, okuyisikhathi lapho iLanga liphakathi kuka-12 no-18 degrees ngaphansi komkhathizwe. Ukuya kwelanga kungukuphela kokuntwela kokusa kwezinkanyezi, futhi kuyisikhathi esimnyama kakhulu sokuntwela kokusa ngaphambi nje kobusuku. Ekugcineni, kuba nobusuku lapho iLanga lifinyelela emazingeni angu-18 ngaphansi komkhathizwe futhi lingasalikhanyisi isibhakabhaka. Izindawo ezisenyakatho ye-Arctic Circle neziseningizimu ye-Antarctic Circle aziboni ukushona noma ukuphuma kwelanga ngokugcwele okungenani ngosuku olulodwa onyakeni, lapho usuku lwe-polar noma ubusuku be-polar buqhubeka ngokuqhubekayo amahora angu-24.
Ukushona kwelanga kungabonwa yonke indawo eMhlabeni ngaphandle kwaseNyakatho naseNingizimu.