Indawo yonke igcwele izinto eziningi ezinhle nezithakazelisayo. Ezinye zinkulu kakhulu, ezinye zincane kakhulu. Kodwa-ke, ubukhulu bezidalwa zasezulwini abukhawuleli isithakazelo esikhulayo sendawo yonke, futhi uthuli lwendawo yonke aluhlukile kulokhu kubaluleka kwezinkanyezi. Ngenxa yalesi sizathu, konke okuhlobene nale nto, etholakala endaweni enkulu, kuchazwa ngokuningiliziwe lapha.
Ungase ube nesithakazelo sokufunda: AMAQEMBU: AMAQEMBU EZINKANYEZI NEMINDANDE ESIKHALENI
Uthuli oluvela endaweni yonke luwuthuli olutholakala kuyo yonke indawo. Luqukethe ngokuyinhloko izinhlayiya ezincane kune-micrometer eziyi-100. Luphinde lube nomkhawulo wosayizi ongaba yi-micrometer eziyi-100, okunqunywa yincazelo ehlongozwayo ye-meteoroid. I- meteoroid , yona , iyinto edlula usayizi oshiwo ngenhla, efinyelela kumamitha angu-50 ububanzi.
Kodwa-ke, le mingcele okukhulunywe ngayo ngaphambili ayiqinile ekuhlukanisweni kwayo. Uthuli lwe-cosmic, ngakolunye uhlangothi, lugcwalisa yonke indawo. Lokhu kufaka phakathi iSistimu yethu Yelanga , yize ubuningi bayo buphansi kakhulu (ubuningi lapha buqondwa njengenani lezinhlayiya ngemitha eyi-cubic), bube bukhulu kakhulu uma buyi-cometary noma uthuli lwediski olujikelezayo futhi bube bukhulu kakhulu uma buyi-interstellar noma uthuli oluphakathi kwemithala.
Yiqiniso, ukuze uqonde lokhu kwamuva, kubalulekile ukuchaza ukuhlukaniswa ngakunye. Isizathu salokhu ukuthi uthuli lwendawo yonke esikhaleni alusakazwanga ngendlela eyodwa, kodwa lukhona ngezindlela ezahlukene ngaphakathi kwalokho okungabonakala kuze kube manje. Okukhona ngale kwendawo yonke ebonakalayo (ingxenye yendawo yonke ebonakalayo eMhlabeni) akwaziwa ngokuqiniseka; ngakho-ke, sizokhuluma ngalokho okufundwe ngaphakathi kokuqonda kwethu kwamanje.
Izinhlobo Zothuli Lwecosmic
Ezingeni le-cosmic, uthuli lwe-cosmic luyinto engekho endaweni ethile, kodwa ehlakazekile kuyo yonke indawo . Ngaphezu kwalokho, luqukethe izinto ezincane ezihlanganisiwe, futhi ukwakheka kwalo kuyahlukahluka kakhulu kuye ngezimo lapho uthuli lwe-cosmic lwakhiwa khona. Le nto yasemkhathini yakhiwe ngezinhlayiya eziqinile zeqhwa nedwala, kanti olunye uthuli luqukethe ngisho nezintambo ze-silicon.
Ngaphezu kwalokho, uthuli lwe-cosmic lusakazwa emafwini, okuyikho okusivimbela ekuboneni izinkanyezi ngemuva kwalo. Ngakolunye uhlangothi, uthuli ludlala indima ebalulekile ekwakhekeni kwezinkanyezi ngisho namaplanethi. Ngenkathi i-Solar System isaqukethe inani elikhulu lothuli lwe-cosmic olusele kusukela ngesikhathi sokwakheka kwamaplanethi, ngaphezu kothuli oluhlala luchithwa yizinkanyezi ezinomsila njengoba zisondela eLangeni.
Uthuli lwe-cosmic lungenye yezinto ezibangela umsila omude noma i-comet eboniswa yi-comet. Kodwa-ke, bekungemnandi ngaso sonke isikhathi ukutadisha le nto yesikhala ngesizathu esifanayo esivimbekile okukhulunywe ngaso ngaphambili.
Lapho uthuli lwe-cosmic selutholakele, ucwaningo lwayo lokuqala lwalungathembisi kakhulu kososayensi. Lokhu kwakungenxa yokuthi uthuli lwe-cosmic, olubizwa nangokuthi uthuli lwe-astronomical , lwalucatshangwa ukuthi luyisiphazamiso esasiphazamisa ucwaningo oluningiliziwe lwezinkanyezi, amaplanethi, nezinye izidalwa zasezulwini. Kodwa-ke, namuhla siyazi ezinye izakhiwo ezithakazelisayo ezivela ngqo othulini lwe-cosmic, ngenxa yalokho sesiqonde kangcono umsebenzi walo kanye nokubaluleka kwalo kwe-astronomical.
Ucwaningo ngalesi sihloko lube lubaluleke kakhulu kangangokuthi abacwaningi bashintshe umbono wabo, besuka ekukuboneni njengesiphazamiso baye esifundweni . Lezi zifundo zinqume ukuthi uthuli lwe-cosmic lungahlukaniswa kokubili ngendawo yalo yezinkanyezi kanye nemvelaphi yalo, ngaleyo ndlela kwasungulwa umehluko phakathi kwezinhlobo ezahlukene zothuli lwe-cosmic.
Isigaba sokuqala: I-Intergalactic Dust
Lolu hlobo lothuli lwe-cosmic lutholakala phakathi kwemithala futhi lungakha ingxenye yamafu othuli oluphakathi kwemithala . Uphenyo oluhlukahlukene luye lwenziwa ngalolu hlobo lothuli lwe-cosmic iminyaka engaphezu kwamashumi amabili. Lezi zifundo zisebenzise izinto eziningana ezibe negalelo elikhulu ekutholeni idatha yakamuva ngalolu hlobo lothuli lwe-cosmic.
Ngo-1997, i-telescope yesikhala se-infrared ye-ISO ye-European Space Agency (ESA) yaba ngeyokuqala ukuthola uthuli esikhaleni esiphakathi kwemithala. Phakathi nalesi senzakalo, izazi zezinkanyezi zaseJalimane nezaseFinland zathola ukujiya kothuli eqoqweni lezinkanyezi i-Coma Berenices, lapho imithala engaphezu kuka-500 yakha khona i-Coma Cluster.
Ngaphambi kwalokhu kutholakala, kwakucatshangwa ukuthi isikhala esiphakathi kwemithala sasiqukethe kuphela izinsalela ezincane zegesi, ngaphandle kokugxila kwezinkanyezi, igesi, nothuli okwakha imithala. Namuhla, lolu hlobo lothuli olusemkhathini luyinto eyinkinga kakhulu lapho kufundwa izimo, imibala, nezinye izingxenye zemithala ehlukene. Kodwa-ke, lobu bunzima buqedwa ukufundwa kwezingxenye zothuli.
Uthuli oluphakathi kwemithala luyamangalisa ukulufunda ngoba luvela ezintweni ezisekelwe emkhathini. Siyazi ukuthi iNdawo Yonke yethu igcwele amakhemikhali ahlukahlukene adala izinkanyezi nezinye izinto eziningi. Kodwa-ke, akunakwenzeka ukwazi konke, ngoba njengabantu, asikwazi ukuhlola yonke indawo. Ngakho-ke, kubalulekile ukutadisha konke esikwaziyo nakho konke okubonwe yimikhumbi-mkhathi ekhishwe eMhlabeni.
Isigaba sesibili: Uthuli lwe-Interstellar
Kulokhu, sibhekene nothuli lwe-cosmic oluhlukile kolunye ngenxa yendawo yalo. Uthuli lwe-interstellar lutholakala ngqo phakathi kwezinkanyezi, njengothuli oluse-nebulae noma amaqoqo avulekile njenge-Pleiades. Uthuli lwe-interstellar "luyizinto eziluhlaza" okukholelwa ukuthi lunegalelo ekwakhekeni kwamaplanethi, futhi ngaphezu kwalokho, ekutholakaleni kwawo ngokungaqondile ngama-telescopes nama-telescopes omsakazo.
Ungase uthande nokufunda: AMAQINISO AMASHA AMATHATHU NGEZINHLABA NOKUHLUKANISWA KWAZO E-COSMOS
Uthuli oluphakathi kwezinkanyezi lubalulekile ekuqondeni ukwakheka kwezinto zasezulwini nokuthi zizalwa kanjani, ziphila kanjani, futhi zifa kanjani, ngokusho kocwaningo olwenziwe izazi zezinkanyezi. Abacwaningi baphinde babonise ukuthi lezi zinhlayiya ezincane zigcwalisa yonke indawo kanye neSistimu Yelanga. Ngaphezu kwalokho, indawo yonke yakhiwe cishe yi-hydrogen engu-70% kanye ne-helium engu-28%; iphesenti elisele liqukethe izinto ezisindayo njengekhabhoni, umoya-mpilo, i-nitrogen, insimbi, ne-silicon.
Kuthiwa amaphesenti amabili asele ayisigamu sothuli oluphakathi kwezinkanyezi, oluqukethe okusanhlamvu okuqinile okungu-micron eyodwa ngobukhulu. I-micron iyiyunithi elingana nengxenye eyodwa kwenkulungwane yemilimitha. Lokhu kusho ukuthi uthuli oluphakathi kwezinkanyezi luncane kakhulu kunothuli loMhlaba; lungachazwa njengomusi. Kodwa-ke, ngesayensi yezinkanyezi, lokhu kunenzuzo yalo: kumunca ukukhanya ngempumelelo. Lesi simo sisiza ekuthwebuleni izici zamaplanethi ngama-telescope.
Lapho lezi zinhlayiya zihlangana ndawonye, kusobala ukuthi ziyanda ngobuningi futhi zakha amadiski azungeze izinkanyezi ezincane . Lena yindlela okusanhlamvu okukhiqizwa ngayo okuzungezayo futhi kushayisane, njengoba izazi zezinkanyezi ziqinisekisa. Eqinisweni, ngezinye izikhathi amaqoqo amakhulu akha akhula kancane kancane abe amaplanethi nama-asteroid ngokulandelana kwekhilomitha, ashayisana ukuze akhe amaplanethi anezakhiwo ezisukela kukhilomitha elilodwa kuya kweziyi-10,000 ngobukhulu.
uphenyo oluningiliziwe
Ngosizo lwe-Hubble Space Telescope ye-NASA, kwenziwa izifundo entweni yasezulwini ebizwa ngokuthi i-Herbig-Haro 30 (HH30) . Le nebula ehlala isikhathi esifushane, ehlotshaniswa nokwakheka kwezinkanyezi, itholakala ku-Taurus yezinkanyezi, iminyaka yokukhanya engu-500 ukusuka eMhlabeni. Lolu cwaningo luqhathanise idatha yokubuka izinkanyezi namamodeli ekhompyutha asetshenziselwa ukwakha kabusha ukwakheka kwamaplanethi.
Imiphumela ikhombisile ukuthi indawo efana noMhlaba ayikatholakali. Ngamanye amazwi, ukuhlola kuqinisekisa ukuthi ayikho indawo okuhlalwa kuyo ngenxa yokushisa okusukela ku-zero kuya ku -100 degrees Celsius . Ngaphezu kwalokho, phakathi kwamaplanethi angaphezu kuka-200 atholakele, izazi zezinkanyezi zigxile kwamanye angaphansi kwaleli banga lokushisa futhi angaba nokuphila uma enamanzi ahlanzekile.
Ngaphezu kwalokho, ucwaningo lunikeze isilinganiso sokukhanya esikhaleni . Ngokukhethekile, kungashiwo ukuthi ama-nebulae, noma amaqoqo othuli oluphakathi kwezinkanyezi, anesibopho sokubonakalisa okungenani u-30% wokukhanya okuphelele komthala. Lokhu kuwukutholakala okubalulekile, njengoba uhlu olukhulu lwemithala luhlala luthakazelisa wonke umuntu, futhi-ke, kososayensi.
Lokhu kutholwa okubalulekile kuchaza ukuthi uthuli oluphakathi kwezinkanyezi lubangela ukukhanya kwemithala. Nakuba lungasho ukuthi luyimbangela yalesi simo kuphela, lubangela u-30% wokukhanya, okusho ukuthi lunegalelo cishe kwengxenye yokukhanya kwemithala.
Isigaba sesithathu: Uthuli lwamaplanethi
Okushiwo ngalolu hlobo lothuli lwe-cosmic, olubizwa ngokuthi uthuli lwe-interplanetary, ukuthi lutholakala lujikeleza iLanga phakathi kwamaplanethi. Eqinisweni, imvelaphi yalo ifana kakhulu neye- meteoroids , ekhishwa ukushayisana phakathi kwezidumbu eziseSistimu Yelanga noma izinsalela zokwakheka kwalo. Luhlanganisa nothuli lwe-comer.
Ngaphezu kwalokho, uthuli oluphakathi kwamaplanethi lwakhiwe yizinhlayiya ezifika ku-100 mm ngobukhulu. Ama-meteoroid nezinto ezinkulu zitholakala ngosayizi ofanayo, ngakho-ke lezi zinhlayiya zincane kakhulu. Uthuli oluphakathi kwamaplanethi luhlobo lothuli oluphakathi kwamaplanethi; lubizwa ngokuthi i-interplanetary ngoba lutholakala phakathi kweLanga namaplanethi.
Uthuli oluphakathi kwamaplanethi luvela ohlotsheni olufanayo lokushayisana okwakha amasathelayithi nama-meteoroid eSistimu Yelanga. Luwuthuli olukhishwa ukushayisana kwezinto zasezulwini noma ngama-comet, futhi luyingxenye yemfucumfucu evela ekwakhekeni kweSistimu Yelanga. Ngaphezu kwalokho, uthuli oluphakathi kwamaplanethi lungabonakala ngezinga elithile eMhlabeni ebusuku obumnyama kakhulu.
Lokhu kusho ukuthi, ngokuqina okukhulu, umuntu angabona ngqo lokho okubizwa ngokuthi ukukhanya kwe-zodiac. Kubizwa kanjalo ngoba ukukhanya okuncane kungabonakala endizeni ye- ecliptic ekuntweleni kokusa noma kokuhlwa. Lokhu kukhanya kuwukubonakaliswa kokukhanya kwelanga okuvela othulini oluphakathi kwamaplanethi eduze neLanga. Iplanethi yethu uMhlaba, ekuhambeni kwayo izungeze iLanga, ibamba izinkulungwane zamathani alolu thuli nsuku zonke (cishe amathani angu-2900 ngosuku).
Ukuthwebula uthuli lwe-interplanetary
Njengoba kushiwo, njengoba uMhlaba ujikeleza iLanga, uqoqa inani elithile lothuli oluphakathi kwamaplanethi. Kulinganiselwa ukuthi amathani angu-2900 alolu thuli ayabanjwa nsuku zonke. Futhi ngokusekelwe ekubalweni, ngalelo jubane lokubanjwa, uma lolu thuli belungabhujiswanga , ungqimba olukhulu lothuli olumnyama, olucishe lube yimitha elilodwa ukuphakama, beluyoba khona eMhlabeni—lolu uthuli oluphakathi kwamaplanethi.
Lolu thuli lunokuguquguquka ngaphakathi kwesimiso selanga, oluthonywa amandla ahlukahlukene, njengokucindezela kwemisebe . La mandla asunduza uthuli oluphakathi kwamaplanethi, alunciphise futhi ngesikhathi esifanayo azama ukuluhambisa luphume ohlelweni lwelanga, ngaleyo ndlela lube yi-vector ye-Poynting.
Lokhu kusho ukuthi ngisho nothuli oluphakathi kwamaplanethi luthintwa amandla amaza kagesi avela eLangeni. Lokhu kucindezela kubuthakathaka kakhulu, kodwa kubonakala kahle emisileni yezinkanyezi njengoba izinkanyezi zisondela eLangeni.
Ngenxa yalokho osekuchaziwe kakade, kubalulekile ukukhombisa umphumela wePoyting-Robertson , okuwukuxhumana okwenzeka phakathi kothuli oluphakathi kwamaplanethi nokukhanya kwelanga. Lokhu kuxhumana kudala amandla anciphisa uthuli, yize engaphansi kokucindezela kwemisebe. Kodwa-ke, kuyisisekelo ngoba kusabalalisa amandla, okwenza inhlayiya iwe kancane kancane ezindizeni, ijikeleze iye eLangeni.
Ukwakhiwa kothuli lwe-interplanetary
Phakathi kwakho konke okukhulunywe ngakho, kubalulekile ukugqamisa ukuthi uma kukhulunywa ngokuhleleka kothuli ohlelweni lwelanga, kuvela ukuthi lugxile kakhulu phakathi kweplanethi iMars neLanga, njengoba lunesimo esiyisicaba se-lenticular, kanye nendiza yalo eyinhloko yokulingana ehambisana nendiza engaguquki yesistimu yelanga, ebizwa nangokuthi indiza ephezulu ye-Aries noma i-Laplace.
Ungase ube nentshisekelo naku: IMINININGWANE NGEZIMO ZEZULU NEZINDABA ZAMUVA
Ngakolunye uhlangothi, ukwakheka kothuli oluphakathi kwamaplanethi akukaqondakali ngokugcwele. Ukuze kutholakale lokhu, kuye kwasetshenziswa izindlela ezahlukene, njengezindiza ngisho namabhaluni esimo sezulu aphezulu ukuqoqa uthuli oluphakathi kwamaplanethi, okuvumela ososayensi ukuthi bafune phansi kolwandle izinto ezifana nama-meteorite. Lawa aziwa ngokuthi ama- cosmic spherules . Lawa ma-spherules anombala omnyama futhi akhiwe ngengxube yama-silicates nama-carbon compounds.
Ngakolunye uhlangothi, ukwakheka okuvamile kothuli oluphakathi kwamaplanethi oluqoqwe eMhlabeni kufana kakhulu nama-chondrites e-carbonaceous. Lolu thuli lunamathela eMhlabeni futhi lufinyelela emhlabathini ngokujiya kube amaconsi amanzi, amaqhwa, noma isichotho. Lokhu kwenzeka ngoba umhwamuko wamanzi usebenzisa uthuli njenge-nuclei yokujiya. Indawo lapho inani elikhulu lothuli oluphakathi kwamaplanethi liqongelela khona eplanethini yethu yiziqongo zeqhwa ezisemaceleni , ezakha indawo yokugcina yemvelo yalolu thuli.
Isigaba Sesine: I-Circumstellar Disk Dust
Lolu hlobo lothuli lwe-cosmic luphawu lwezinkanyezi ezincane lapho ama-exoplanets engakakhiwa khona. Kulokhu, kubalulekile ukuchaza ukuthi iyini idiski ye-circumstellar. Lena isakhiwo sezinto esimise okwendandatho noma esimise okwe-torus esiseduze nenkanyezi. Idiski ye-circumstellar yakhiwe kakhulu ngegesi, uthuli, nezinto ezinamatshe noma ezibandayo ezibizwa ngokuthi ama-planetesimals.
Ngaphezu kwalokho, lawa madiski ajikelezayo angavela ngesikhathi sesigaba sokwakheka kwezinkanyezi. Kungaleso sikhathi, kusukela efwini elifanayo legesi nothuli lapho inkanyezi yakheka khona (okubizwa nangokuthi amadiski e-protoplanetary), lapho, nakuba iningi lezinto kamuva liqoqwa yinkanyezi, likhishwe umoya wezinkanyezi, noma libanjwe njengamaplanethi, inani elisele lingasinda njengebhande le-asteroid noma ibhande le-Kuiper.
Ngaphezu kwalokho, idiski ye-circumstellar ingakheka lapho amaplanethi amabili , abizwa nangokuthi ama-planetesimals, eshayisana; lena yidiski yemfucumfucu. Ingakheka futhi ngesikhathi senqubo yokubamba igesi emoyeni ongaphezulu wenkanyezi ehambisana nayo uma kwenzeka izinkanyezi eziseduze; lena yidiski yokwanda.
Idiski yokuqala yezinkanyezi eyake yatholakala izungeze inkanyezi efana neLanga yabonwa ngo-2004 lapho iqembu lezazi zezinkanyezi lithola idiski yezinkanyezi yezinkanyezi ezizungezile inkanyezi i-HD 107146.
Ukwahlukaniswa Kwesihlanu: Uthuli Lwediski Eyindilinga
Isibonelo salolu hlobo lothuli lwendawo yonke sitholakala emasongweni eplanethi kaSaturn noma u-Uranus. Ukuze siqonde lokhu kabanzi, kubalulekile ukuchaza ukuthi iyini indandatho yeplanethi : iyindandatho yothuli futhi ihlanganisa, vele, nezinye izinhlayiya ezincane kakhulu ezijikeleza iplanethi. Amasongo amahle kakhulu futhi aziwa kakhulu, abonwe kusukela enkathini ye-telescopic, yilawo kaSaturn. Isikhathi eside, kwakucatshangwa ukuthi iSaturn yiyona kuphela iplanethi enezindandatho, futhi ukuhluka kwayo kwakuyinkinga.
Ngaphezu kwalokho, amasongo e-Uranus atholakala ngo-1977. Kodwa-ke, ngobuchwepheshe obuthuthukisiwe banamuhla, kuye kwaba nokwenzeka ukusondelana namanye amaplanethi, futhi ngenxa yalesi sizathu, manje sekuyaziwa ukuthi amaplanethi amane amakhulu eSistimu Yelanga kanye ne-centaur eyodwa anezinhlelo zawo zendandatho. Lawa amaplanethi i-Jupiter, i-Saturn, i-Uranus, i-Neptune, kanye ne- centaur Chariklo.
Ngenxa yale ntuthuko yezobuchwepheshe, abacwaningi bakwazile ukuthola ukuthi iJupiter inesimiso sendandatho kanti i-Uranus inezindandatho okungenani eziyisishiyagalolunye ezihlukile. Indlela kaVoyager yokusondela kuNeptune ngo-1989 yaqinisekisa ukuthi izindandatho zivamile phakathi kwamaplanethi amakhulu egesi eSistimu Yelanga yangaphandle. Izindandatho zikaNeptune zazibhekwa njengezingavamile, zibonakala zakhiwe ngama-arcs angaphelele; nokho, izithombe zikaVoyager zembula izindandatho eziphelele, yize zinezingxenye zokukhanya okuhlukahlukene, okusho ukuthi ama-arcs akhanyayo kuphela ayebonakala eMhlabeni.
Kulinganiselwa ukuthi ithonya lamandla adonsela phansi lenyanga yomalusi iGalatea, kanye nezinye izinyanga zomalusi ezingakatholakali , yilona elibangela lezi ziqephu ezindongeni. Ngaphezu kwalokho, ukwakheka nobukhulu bezinhlayiya zendandatho kuyahlukahluka; zingaba uthuli oluyi-silicate noma oluyiqhwa, olutholakala kuphela cishe kumaplanethi amane amakhulu, kanye neqhwa lamanzi uma kukhulunywa ngeSaturn. Ngaphezu kwalokho, ubukhulu bazo busukela kuma-micrometer kuya emadwaleni angamashumi amamitha ububanzi.
Izici zamaplanethi
Isici esiyingqayizivele samaplanethi aqukethe amadiski othuli oluzungezayo ukuthi amasongo awo ngezinye izikhathi anezinyanga zomalusi. Lezi yizinyanga ezincane kakhulu ezizungeza imiphetho engaphandle yamasongo noma ngisho nangaphakathi kwezikhala emasongweni, okwenza kube nokuhlukana. Ubukhulu benyanga yomalusi busukela kukhilomitha elilodwa kuya kwamashumi amakhilomitha.
Amasathelayithi aphawulekayo okukhulunywe ngawo ngenhla atholakala ngaphakathi kwesistimu yendandatho kaJupiter kanye nangaphakathi komkhawulo weRoche kaJupiter . Inyanga engaphakathi komkhawulo weRoche ingahlala ingashintshi kuphela uma ukuhlangana kwayo kunqoba amandla ahlukene adonsela phansi phakathi kwezingxenye zayo ezimbili ezihlukene; ngenxa yalokho, kumele ibe ncane futhi ibe ncane. Amandla adonsela phansi ala masathelayithi alusa asebenza ekugcineni umkhawulo wangaphandle wendandatho uchazwe kahle.
Ukuthi amasongo eplanethi akhiwa kanjani akukaziwa namanje . Okusho ukuthi, imvelaphi yawo ayaziwa; nokho, kulinganiselwa ukuthi awazinzile futhi ayanyamalala phakathi neminyaka eyizigidi ezimbalwa. Ngenxa yalokho, izinhlelo zamanje zesongo kumele zibe nomsuka wesimanje, okungenzeka ukuthi zakhiwe ngodoti wesinye isathelayithi semvelo esasithinteke kakhulu noma ezintweni zokuqala.
Isigaba sesithupha: Uthuli lwamahlaya
Lolu hlobo lothuli lwe-cosmic lukhishwa kuma-comet ngumoya welanga. Lungakhiqiza ama-meteor uma lungena emkhathini woMhlaba, futhi lukhiqize ngisho nama-meteor uma ekhona ngobuningi. Ngokukhethekile, uthuli lwe-comet luwuthuli lwe-cosmic oluvela ku-comet. Lukhiqizwa umoya welanga, okhipha izinhlayiya zothuli oluvela ku-comet ziye emkhathini lapho i-comet iseduze neLanga.
Iqiniso elilodwa elibalulekile ngothuli lwe-comet ukuthi lolu thuli lunganikeza ulwazi oluthakazelisayo mayelana nomsuka nokwakheka kwe-comet. Ngaphezu kwalokho, uma lolu thuli lukhishwa yi-comet endaweni eseduze nomjikelezo woMhlaba, lungangena emkhathini woMhlaba, okubangela imvula ye-meteor. Kwezinye izimo, amazinga amakhulu kakhulu othuli angadala ngisho nemvula ye-meteor.
Lesi simo sizokwenzeka njalo lapho uMhlaba udlula endaweni lapho uthuli lwe-comater lwakhishwa khona, kuze kube yilapho uMhlaba ekugcineni umunca lonke uthuli lwe-comater olusele ngemuva. Isibonelo salokhu uthuli lwe-comater oluvela emfucumfucwini eyakhishwa yi-Comet 1P/Halley , eyakhiqiza imvula emibili ye-meteor: ama-Orionid ngo-Okthoba kanye nama-Eta Aquarids ngoMeyi.
Mhlawumbe uthuli lwe-cometary luhlaba umxhwele kakhulu oluvela eMhlabeni. Luphinde lukhange kakhulu ezinhlotsheni eziyisithupha zothuli lwe-cosmic ezitholakala emkhathini . Lokhu kungenxa yokuthi lolu hlobo lothuli luvame ukufinyelela eMhlabeni. Kodwa-ke, uhlobo ngalunye lothuli lwe-cosmic lubaluleke kakhulu ekuqondeni nasekufundeni izinto zasezulwini ngisho nendawo yonke uqobo.