Kumiswa, Isayensi
Amabanga emkhathini. iyunithi yezinkanyezi, ngonyaka ukukhanya Parsec
Ukuze izibalo yakhe, izazi zezinkanyezi zisebenzisa amayunithi ekhethekile, engewona nokho kwacaca kubantu abavamile njalo. Kuyaqondakala, ngoba uma amabanga cosmic kubalwa amakhilomitha ke inani amaqanda emehlweni yayiyobizwa dazzled. Ngakho-ke, ukuze ilinganisele ibanga cosmic evamile ukusebenzisa izinto eziningi olukhudlwana: iyunithi Ngokwesayensi yokuhlolwa kwezinkanyezi, ngonyaka ukukhanya Parsec.
Ngakusasa ngobukhulu - ngonyaka ukukhanya. Nakuba kukhona okwamanje igama elithi "unyaka", akusiyo okudingeke ukuba akucabange ukuthi cishe isikhathi. Ngomunye unyaka ukukhanya kuyinto 63.240 AU Lena indlela, okuyinto enza wokukhanya ukukhanya unyaka ongu-1. Izazi zezinkanyezi ziye zathi kusukela ekude kakhulu ray yonke yokukhanya kufinyelele kithi angaphezu kwezigidi eziyizinkulungwane ezingu-10. Iminyaka. Ukuze ukucabanga lokhu ibanga elikhulu, thina ulibhala amakhilomitha: 95000000000000000000000. ayisishiyagalolunye nanhlanu amakhilomitha bhiliyoni isigidintathu evamile.
Ngakho, lapho uyalandelwa mayelana 17 imizuzu isikhathi umehluko. Kusukela la mazwi, kwaphethwa ngokuthi: ukukhanya oku ukudlula ibanga elide wathatha imizuzu 17 in the ububanzi umzila wokuzungeza komhlaba. Njengoba liye kungase kutholakale ukuthi ububanzi we orbit imayelana million 186 amamayela (manje lokhu njalo kuyinto 939 120 000 km), kuvela ukuthi ukukhanya ugongolo uhamba ngesivinini mayelana 186.000 amamayela 1 yesibili.
Ngezinhloso esisebenzayo izazi zezinkanyezi wayevame ukusebenzisa ezifana parsecs iyunithi ibanga. Kuyinto ilingane displacement ezinkanyezi zasemuva zezinye izinto ezisemkhathini 1 '' at ukufuduka obuka ngaso 1 engaba nomjikelezo woMhlaba. Kusukela elangeni ukuze inkanyezi eseduze (lokhu Proxima Centauri uhlelo Alpha Centauri) 1.3 parsecs. Omunye Parsec kulingana 3,2612 zokuxhumana. iminyaka noma 3.08567758 × 1013 km. Ngakho, unyaka ukukhanya-engaphansana nje kwengu-ingxenye yesithathu Parsec.
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