Ngokuvamile kukhulunywa ngakho Ukungcola okulula noma ukungcoliswa kwesithombe lapho ukukhanya okufakelwayo kugcwele futhi kutholakala yonke indawo kangangokuba kuthinta ubumnyama obujwayelekile nobufiselekayo bobusuku. Ngale ndlela, uma kuhlwa nje, imithombo eminingi yokukhanya yokufakelwa ithatha indawo elangeni emadolobheni ngisho nasemadolobheni amancane.
Abanye ososayensi bachaza igama elithi ukungcola ukukhanya njenge-infrared, imisebe yokukhanya ebonakalayo ekhishwa ngaphandle noma ngaphandle, nokuthi ngenxa yokuqondiswa kwayo, umfutho nekhwalithi yayo, kungaba nomthelela omubi ongathandeki kumuntu, endaweni, noma emvelweni.
La ukungcola ukukhanya kuyindlela yokungcola engavamisile ukukhishwa ngoba i-priori ayiyona ingozi empilweni, uma iqhathaniswa nokungcola okuvamile kwemfucuza, intuthu yasemadolobheni, indle nokunye.
Nokho, i ukungcola ukukhanya inemiphumela ezintweni eziphilayo futhi ingancishiswa kalula.
Kusukela ngo-1830, labo ababhekele ukukhanyisa iParis bakhanyisa kuphela isibani esisodwa emigwaqweni emibili ngobusuku nenyanga ecacile. Umsebenzi ohlobene nokukhathazeka kokonga hhayi kakhulu nge ukungcola ukukhanya, okwakusengabalulekile kakhulu. Muva nje, i-American Dark Sky Association, kusukela ngo-1988 yenza lo mkhuba waziwa, othuthukiselwe entweni eyingozi ngokweqiniso, futhi ebonakalayo kubo bonke. Ngempela, amaphuzu akhanyayo awayeki ukuphindaphindeka.
In the 1992 UNESCO Kufakwe esimemezelweni sayo samalungelo ezizukulwane ezizayo, isigaba esithile esinelungelo lokulondolozwa kwesibhakabhaka nobumsulwa baso. Ngo-2002, iCongress of Venice neLucerne yakhipha izingcingo kohulumeni bomhlaba ukuba bavikele isibhakabhaka ebusuku. Njengamanje, i- UN ihlose ukubheka isibhakabhaka esigcwele izinkanyezi njengefa elijwayelekile lesintu.
Khomba ukungcoliswa kokukhanya
La ukungcola ukukhanya ibonakala ikakhulukazi lapho isibhakabhaka simbozwe amafu aphansi, njengoba lokhu kukhanya futhi kusabalalisa ukukhanya amamayela. Ngale ndlela, isibhakabhaka sibonakala simnyama ngokusawolintshi-pink. Lokhu kubonakala ikakhulukazi ezixukwini ezinkulu. Imvamisa, isibhakabhaka kufanele sibe mnyama ngokuphelele, noma sikhanyiswe yinyanga kuphela. Lapho isimo sezulu sicacile, futhi ngaphandle kwedolobha, i- cielo Kumnyama kakhulu kunasedolobheni, futhi ukuba khona kwedolobha elikhulu kungabonakala kalula ngenguquko yesibhakabhaka ejika ibomvana ngokukhanyayo bese ikhanya.