Ngonyaka odlule, izazi zezinkanyezi zithola izinkulungwane zama-asteroid asondelene nawo asemhlabeni, okuyirekhodi lazo zonke izikhathi zokubuka. Lokhu kubikwa ku-The Nature Magazine.
Ngomhlangothi wesithupha kaMashi 2021, i-asteroid apophile yasondela emhlabeni ebanga eliseduze kakhulu eminyakeni eyisishiyagalombili. Isikhala esithi "Amatshe amatshe" ngesilinganiso samamitha angama-340 andiza amakhilomitha ayi-16 esigidini esivela emhlabathini wethu, obhekwa njengebanga eliphephile.
Ngo-2029, ama-apophis azobuyela futhi, kulokhu, umhlangano wakhe nomhlaba ngeke abe ngotshwala obukhulu: i-asteroid izohambisana neplanethi yamakhilomitha angama-30-40 futhi izoba ngaphakathi komjikelezo we-geost . Isivakashi setshe singabonakala ngeso elinqunu. Izazi zezinkanyezi okokuqala emlandweni wanamuhla zizokwazi ukubona i-asteroid enkulu eduze kakhulu.
Ukuvikelwa kweplanethi
I-span ye-apole apophis ngesonto eledlule yanikeza ososayensi ithuba elihle lokuhlola uhlelo lwesexwayiso mayelana nezimo eziyingozi endaweni ezayo. Ngama-telescopes akhethekile, ososayensi abavela ezingxenyeni ezahlukene zomhlaba babheka isibhakabhaka ebusuku futhi balandelela izinto eziseduzane ezibonisa ingozi engaba khona kwiplanethi yethu. Imizamo yokubona ama-apophis ikhombisile ukuthi amaqembu ezizembujazi, kunoma iyiphi ingxenye yezwe abayena, angasebenzisana ukuze asongelwa yi- "Stones" e-cosmic.Sesha ama-asteroid
Zonke izinhlaka ze-Aerospace zomhlaba zinezinhlelo zazo zesexwayiso mayelana nezimo eziyingozi endaweni eseduze engenalutho. Isibonelo, i-NASA isebenzisa lezo zinhlelo ukucinga ama-asteroid aseduze naseMhlabeni kanye nokuhlola usongo lwayo olungaba khona kusukela ngo-1998. Ngalesi sikhathi, abasebenzi be-ejensi bathola izinto ezinjalo ezingama-25,000. Njengoba imvelo ibhala, ngonyaka owedlule sekuyirekhodi lokuvula. Naphezu kobhubhane lweCovil-19, oluthonya umsebenzi wososayensi abaningi, izazi zezinkanyezi zatholakala futhi zangeniswa kukhathalogi ka-2958 ngaphambili ezaziwa ama-asteroid aseduze naseMhlabeni.
Ngaphezu kwengxenye yalezi zidumbu zikwazile ukuqaphela nge-Catalina Sky Survey - Ama-telescopes amathathu akhiwe e-Arizona. Ama-telescopes akwazi ukuthola ngisho ne-asteroid encane ngokuphelele i-asteroid 2020 CD3, ububanzi obungaphansi kwamamitha amathathu, ababambe amandla adonsela phansi emhlabeni. I-satellite yesikhashana yomhlaba yacisha imijondolo yamandla adonsela phansi kanye nesokunxele kwe-geocentric orbit ngo-Ephreli ngonyaka owedlule. I-Absolute Star Magnitude 2020 CD3 - 32m, Albedo - 0.1-0.6.
[Isigaba Esihlokweni: I-European Space Agency: Umhlaba Usongela Ama-Asteroid ayizinkulungwane eziyi-15]
Elinye i-batch of asteroid eseduze ne-Earth - Into engu-1152, ivule uhlelo lwe-Pan-Starns Telescope eHawaii. Phakathi kokuthola okunelukuluku - 2020 Ngakho-ke, okwakungeyona i-asteroid, kepha ingxenye yophiko lokusheshisa "uCentaurus" woMhloli 2 Apparatus, wethulwe emkhathini ngo-1966.
Amanye ama-asteroid
Ezinye zezinto eziseduzane zasemhlabeni ezitholakala ngo-2020 zeza zafika emhlabathini ukuze zisondele kakhulu. Okungenani abangu-107 babo badlula ngeplanethi yethu kude, okungaphansi kakhulu kunebanga ukuya enyangeni.
Isibonelo, ngo-Agasti, i-asteroid 2020 QG yandiza nje ngo-2950 km phezu koLwandlekazi waseNdiya. Futhi ngemuva kwezinyanga ezintathu, enye into encane enobubanzi bamamitha ayi-5-10 - 2020 vt4, idlule kumakhilomitha angama-345 kuphela ukusuka eMhlabeni, okungaphansi komgwaqo we-ISS. Izithombe zokuqala zatholakala amahora angu-15 kuphela ngemuva kokusondela emhlabathini wethu. Uma efaka izingqimba eziqinile zomkhathi, cishe, wayezohlukana.
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