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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.

Iyunithi yezinkanyezi ivame zibonisa amabanga ngaphakathi siqu esimisweni sethu sonozungezilanga. Uma ibanga inyanga usengakwazi luboniswe amakhilomitha (384,000 km), the esiseduzane indlela Pluto sika imayelana million 4250 km kungenxa ukuqonda kuyoba nzima ngempela. Ngenxa yalezi amabanga isikhathi ukusebenzisa iyunithi yezinkanyezi (AU) okuyinto ilingana ibanga isilinganiso kusukela phansi kuya elangeni. Ngamanye amazwi, AU 1 It kulingana ubude eksisi semimajor Earth wethu uzungeza emzileni (izigidi ezingu-150. Km.). Manje, uma ubhala ukuthi ibanga emfushane eya Pluto 28 AU, futhi indlela elide kakhulu kungenzeka 50 AU, kuba lula kakhulu ukuba ukucabanga.

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.

Iqiniso lokuthi ukukhanya luhamba akuyona leso, kodwa nge speed ethile, abacwaningi aqala ukusola kusukela 1676. Kwakuphakathi nalesi sikhathi isazi sezinkanyezi Danish Ole Roemer okuthiwa waphawula ukuthi ukusitheka kwelanga nokusitheka kwenyanga iziphuphutheki kaJupiter aqala ukuwela ngemuva, futhi okwenzeka ngesikhathi lapho Earth elibangise orbit kuya uhlangothi Sun, reverse okwakusemzini Jupiter. Kwathatha isikhathi, i-Earth lwaqala ukubuyela, futhi ukusitheka yabuye yaqala ukuya namanje ehleliwe.

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.

Esikhathini sethu, sibonga UProfesa Albertu Maykelsonu, owayezimisele kakhulu ngokunembile ukuthi liyini ngonyaka ukukhanya, ne umphumela wokugcina etholwe ngokusebenzisa indlela ehlukile: 186.284 amamayela elingu-1 (alinganiselwa ku-300 km / s). Manje, uma ukubala inani imizuzwana ngonyaka futhi kuphinde by le nombolo, sithola ukuthi ngonyaka ukukhanya kuyinto ubude 5 880 000 000 000 wamakhilomitha, okuhambelana 9.460.730.472 580,8 km.

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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