Eminyakeni yamuva nje, igama elithi "exoplanet" belilokhu lithola ukuthandwa emphakathini wesayensi kanye nabezindaba kanye nesiko elidumile. Ukuthakasela ngale mihlaba ngale kwesimiso sethu sonozungezilanga kuye kwabhebhethekisa uphenyo olungenakubalwa, uhambo lwasemkhathini, nezindaba ezimangalisayo mayelana nokwenzeka kokuthola ukuphila kwenye indawo endaweni yonke. Kodwa ayini ama-exoplanets ngempela? Zingatholwa kanjani futhi zihlukaniswe kanjani? Futhi kungani zivusa isithakazelo esikhulu kangaka phakathi kwezazi zezinkanyezi nezimfundamakhwela?
Lesi sihloko siwumhlahlandlela ojulile nonemininingwane wama-exoplanets, lapho uzothola khona yonke into kusukela ezisekelweni zomlando wokusesha kwawo kuya ezindleleni zesimanjemanje zokutholwa, okuhlanganisa ukuhlukaniswa kwawo, izici, izibonelo eziphawulekayo, nendima ebalulekile ayidlalayo ekusesheni ukuphila kwangaphandle.. Uma uke wazibuza ukuthi sazi kanjani ukuthi amaplanethi akhona ngale kweLanga, yiziphi izinhlobo zama-exoplanet akhona, noma mangakanani amathuba okuthola “amawele” oMhlaba, uzothola zonke izimpendulo lapha, ezethulwe ngokucacile nangokuphelele.
Iyini i-exoplanet? Incazelo kanye nencazelo eyisisekelo
I-exoplanet, eyaziwa nangokuthi iplanethi ye-extrasolar, iyiplanethi engeyona eyesimiso sethu sonozungezilanga, okungukuthi, izungeza inkanyezi ngaphandle kweLanga. Nakuba sekungamakhulu eminyaka umqondo wokuba khona kwemihlaba engalé kwendawo yethu yelanga wawuyizinto zokuqagela kanye nenganekwane yesayensi, namuhla ukutholakala kwama-exoplanets kungenye yezinkambu ezijabulisa kakhulu zesayensi yezinkanyezi yesimanje.
Igama elithi exoplanet livela kusiqalo esithi “exo-,” okusho ukuthi “ngaphandle,” kanye negama elithi “iplanethi.” Ngakho-ke, i-exoplanet ngokwezwi nezwi "iplanethi engaphandle" noma, ikakhulukazi, ngaphandle kwesimiso sonozungezilanga. Wonke amaplanethi esiwaziyo—iMercury, iVenus, uMhlaba, iMars, iJupiter, iSaturn, i-Uranus, neNeptune—ayingxenye yesimiso sethu sonozungezilanga futhi azungeza iLanga. Nokho, izinkanyezi esizibona esibhakabhakeni—izigidigidi zazo emthaleni wethu i-Milky Way uwodwa—zingaba namaplanethi awazungezayo futhi zinawo.
Ngakho-ke, ama-exoplanet sibiza amaplanethi azungeza izinkanyezi ngaphandle kweLanga. Angase afane kakhulu namaplanethi esimiso sethu sonozungezilanga (amadwala njengoMhlaba noma igesi njengeJupiter), noma ahluke ngokuphelele kunoma yini esiyaziyo. Konke lokhu kubenza babe ngenye yezimfihlakalo ezinkulu nezikhangayo zendawo yonke yangaleso sikhathi.
Umlando omfushane wokusesha nokutholwa kwama-exoplanets
Umbono wokuba khona kwemihlaba engaphezu kowethu awumusha. Emuva ekhulwini le-16, ongqondongqondo abanjengoGiordano Bruno baphikisa ngokuthi izinkanyezi zingase zibe amalanga akude aphelezelwa amaplanethi azo. Kodwa-ke, isikhathi eside ukusesha ama-exoplanets kwakuwumbono nje, njengoba sasingenazo izindlela nobuchwepheshe bokuzibona.
Izinsolo zokuqala nokutholwa okusolwayo kwamaplanethi angaphandle kwe-solar kuhlehlela emuva ekhulwini le-19 nasekuqaleni kwekhulu lama-20, nakuba eziningi zalezi zimemezelo zibonakale zinephutha noma umkhiqizo wokuchazwa kabi.. Kwakungeminyaka yawo-1990 lapho intuthuko kwezokusebenza kwezinkanyezi kanye nokubuka kwaqinisekisa ukuba khona kwama-exoplanets okuqala.
Ukutholwa kokuqala okubhekwa njengokuqinile kwaba ngo-1992, lapho amaplanethi amaningana anobunzima bomhlaba atholwa ezungeza i-pulsar PSR B1257+12. Kodwa-ke, usuku olubalulekile ngu-1995, lapho izazi zezinkanyezi zaseSwitzerland uMichel Mayor noDidier Queloz bememezela ukutholakala kwe 51 Pegasi b, i-exoplanet yokuqala etholwe eduze kwenkanyezi efana neLanga. Lokhu kubenze bathola umklomelo weNobel kuPhysics ngo-2019 futhi kwahlanganisa ukuqala kokuhlolwa okuhlelekile kwamaplanethi angaphandle kwelanga.
Kusukela lapho, inani lama-exoplanets atholakele liye landa kakhulu. Ngokusho kwedatha yakamuva ye-NASA, sekuqinisekisiwe ama-exoplanets angaphezu kuka-5.500, futhi unyaka ngamunye uhlu lukhula njengoba amasu ecwengwa futhi kwethulwa imisebenzi emisha yasemkhathini enikezelwe ekusesheni kwabo, njenge-Kepler, TESS, kanye ne-James Webb Space Telescope.
Kungani kunzima kangaka ukuthola ama-exoplanets?
Ukubuka i-exoplanet kuyinselelo yangempela yobuchwepheshe nesayensi. Nakuba ngokuvamile ziyimizimba emikhulu yamaplanethi, ibanga lazo ukusuka eMhlabeni kanye nokukhanya okukhulu kwezinkanyezi ezingabazali bazo kuzenza kube nzima ngendlela emangalisayo ukuzibona ngokuqondile. Ngamagama alula, Ama-exoplanet avamise ukubonisa noma akhiphe inani elincane lokukhanya uma kuqhathaniswa nenkanyezi ayizungezayo.: umehluko ungaba izikhathi eziyizigidi eziyizinkulungwane ezimbalwa.
Iningi lama-exoplanets aziwayo alibonwanga ngokuqondile, kodwa kunalokho ngezindlela ezingaqondile. Okusho ukuthi, izazi zezinkanyezi zinquma ukuba khona kwazo ngokuhlaziya imiphumela eziyibangelayo ezinkanyezini ezibambile, njengokushintsha kokukhanya, ukukhanya kokukhanya, noma ukunyakaza.
Ukuthwebula i-exoplanet ngokuqondile kuyimpumelelo eyivelakancane. futhi kungenzeka kuphela ezimweni eziqondile kakhulu, njengalawo maplanethi amakhulu kakhulu, mancane kakhulu, noma akude nenkanyezi yawo. Ukuthuthukiswa kobuchwepheshe obusha, obufana ne-James Webb Telescope, kuvula amathuba amasha okuthwebula izithombe nokuhlaziya umkhathi, nakuba kusekuningi okufanele kwenziwe kulo mkhakha.
Izindlela zokuthola ama-exoplanets
Isayensi yezinkanyezi yesimanje isebenzisa izindlela ezimbalwa ukuthola nokufunda amaplanethi angaphandle kwesimiso sonozungezilanga. Indlela ngayinye inezici zayo, izinzuzo, nokulinganiselwa kwayo, futhi ukusebenza kwayo kuncike ezicini ezinjengobukhulu beplanethi, ibanga layo nenkanyezi, nokuthambekela komjikelezo wayo. Ngezansi, sibuyekeza izindlela zokuthola eziyinhloko:
1. Indlela yezokuthutha
Indlela yezokuthutha ihlanganisa ukubona ukuncipha kancane kokukhanya kwenkanyezi lapho iplanethi idlula phambi kwayo, njengoba ibonakala eMhlabeni. Lokhu “kusitheka okuncane” kutholwa njengokwehla ngezikhathi ezithile nokuphindaphindiwe kwenani lokukhanya okufinyelela kithi kusuka enkanyezini. Ngokuhlaziya ubukhulu kanye nokuba khona kwezikhathi kwalokhu kudlula, izazi zezinkanyezi zingalinganisa ubukhulu beplanethi, ibanga layo ukusuka enkanyezini, futhi ngezinye izikhathi nolwazi ngomkhathi wayo.
Lolu hlelo lwaduma ngomsebenzi we-NASA's Kepler, othole izinkulungwane zama-exoplanets asebenzisa le nqubo. Indlela yezokuthutha iphumelela kakhulu ekutholeni amaplanethi amakhulu eduze nenkanyezi yawo, kodwa ingathola nemizimba elingana noMhlaba emigudwini elungele ukuphila, kuye ngokunemba kwezinsimbi.
2. I-Radial velocity noma indlela ye-Doppler wobble
I-Radial velocity, noma umphumela we-Doppler, ithola ama-exoplanet ngokulinganisa ukuzungeza noma “ukuzamazama” kwenkanyezi yomzali wawo, okubangelwa amandla adonsela phansi eplanethi phakathi nokuzungeza kwawo. Lapho iplanethi izungeza inkanyezi, zombili zizungeza isikhungo esivamile sobuningi. Lokhu kukhiqiza amashifu amancane ku-spectrum yokukhanya kwenkanyezi, okungalinganiswa ngezinsimbi ezinembe kakhulu.
Indlela ye-Doppler iwusizo kakhulu ekuhlonzeni amaplanethi amakhulu kakhulu, “njengama-Jupiter ashisayo,” aseduze nenkanyezi yawo.. Nakuba inganikezi ulwazi oluqondile mayelana nobukhulu beplanethi, isivumela ukuba sibale ubukhulu bayo obuncane futhi sithole nemininingwane yokuzungeza kwayo. I-exoplanet yokuqala ezungeze inkanyezi efana neLanga, i-51 Pegasi b, yatholakala ngale ndlela.
3. I-Gravitational microlensing
I-Gravitational microlensing isebenzisa ithuba le-lensing edalwe inkambu yamandla adonsela phansi yenkanyezi edlula phambi kwenkanyezi ekude. Uma inkanyezi elengayo ineplanethi, ukukhuliswa kokukhanya okungemuva kubonisa isici “sokuqopha”. Le ndlela ayivamile kangako, kodwa ivumela ukutholwa kwama-exoplanet ezinhlelweni zezinkanyezi ezikude kakhulu noma ngemizila ebanzi, okungaba nzima ukuyithola kusetshenziswa ezinye izindlela.
4. Izithombe eziqondile
Ukuthwebula izithombe eziqondile zama-exoplanets kuyinkimbinkimbi kakhulu, kodwa kungenzeka kwezinye izimo. Izinhlelo ezinhle kakhulu yilezo ezinamaplanethi amakhulu, amancane akude nenkanyezi yawo, imisebe yawo ye-infrared igqama ngokumelene nokukhanya kwenkanyezi. Izibonakude ezinama-optics athuthukisiwe nama-coronagraphs zisetshenziselwa ukuvimba ukuxhopha kwenkanyezi futhi ziveze ukukhanya kweplanethi okufiphele. Izibonelo ezivelele zempumelelo yokuthwebula izithombe eziqondile zifaka iplanethi engu-2M1207b nezimbalwa ohlelweni lwe-HR 8799.
5. Ezinye izindlela nentuthuko
Kukhona futhi amanye amasu ahambisanayo noma avelayo, njenge-astrometry (ukulinganisa amashifu endaweni yenkanyezi), ukuhluka kwesikhathi sezokuthutha, ukuhlaziya i-spectrum yomkhathi weplanethi ngesikhathi sokuthutha, i-polarimetry, noma ukutholwa okungaqondile ngokungahambi kahle othulini namadiski egesi azungeze izinkanyezi ezincane. Zonke lezi zindlela, zihlangene, zivumela izazi zezinkanyezi ukuthi zibone izinhlobonhlobo ezinkulu zama-exoplanet futhi zifunde izakhiwo zazo ngokuningiliziwe.
Ukuhlukaniswa kwama-exoplanets: izinhlobo nezigaba
Ukwehlukahlukana okukhulu kwama-exoplanets atholakele kuze kube manje kuye kwaphoqa umphakathi wesayensi ukuthi usungule izigaba ezahlukahlukene nezinhlelo zokuhlukanisa. Lezi zigaba zisekelwe ngokuyinhloko kumapharamitha afana nesisindo, usayizi, ukwakheka, izinga lokushisa, nebanga ukusuka kunkanyezi. Ezinye zezinhlobo eziyinhloko zama-exoplanets yilezi ezilandelayo:
- Imidondoshiya yegesi: Amaplanethi afana neJupiter noma iSaturn, akhiwe kakhulu yi-hydrogen ne-helium. Imvamisa kuba ngabokuqala ukutholwa, ngenxa yokuthi ubukhulu bawo nobukhulu budala imiphumela ebonakalayo ezinkanyezini ezingabazali bazo.
- AmaNeptunians: Incane kunemidondoshiya yegesi kodwa isakhiwe kakhulu igesi, njenge-Uranus neNeptune. Okunye okufakwe lapha “ama-mini-Neptunes,” anenqwaba emaphakathi nezingoma ezihlukahlukene.
- I-Super-Earths: Amaplanethi anesisindo phakathi koMhlaba neNeptune. Zingaba ngamatshe, amanzi noma i-gaseous, kuye ngokubunjwa kwazo kanye nezimo zokubunjwa. Kukholakala ukuthi ama-super-Earth amaningi angahlalwa noma okungenani ahambisane nempilo.
- Umhlaba: Kubhekiselwa kumaplanethi anobukhulu obufanayo nobukhulu obufana noMhlaba, iningi lawo elinamatshe. Ziyizo okuhloswe ngazo kuqala emishinini eminingi, njengoba zinganikeza izimo ezivumayo zempilo njengoba sikwazi.
- Amaplanethi e-lava, amaplanethi eqhwa, namaplanethi olwandle: Kukhona ama-exoplanets ama-surface awo angase akhiwe ngokuphelele yi-lava, iqhwa, noma ulwandle olukhulu lwamanzi noma olunye uketshezi. Le mihlaba eyeqisayo imele inselele emibonweni evamile yokwakheka kwamaplanethi.
Ukuhlukaniswa kwe-exoplanet kungase kuhlanganise ezinye izigaba, njengamaplanethi e-pulsar (azungeza izinkanyezi ezifile), amaplanethi azungezile (azungeza izinkanyezi ezimbili), noma amaplanethi "akhohlakele" (angazungezi noma iyiphi inkanyezi, kodwa azulazula emkhathini wezinkanyezi).
Ngaphezu kwalokho, kunesigaba esishisayo sama-exoplanet, ahlanganisa amaplanethi ngokwesilinganiso sawo sokushisa esilinganiselwe, ibanga lawo nenkanyezi yawo, kanye nohlobo lwenkanyezi ayizungezayo. Lokhu kusivumela ukuba sehlukanise phakathi kwamaplanethi ashisayo, apholile, abandayo, noma lawo anamazinga okushisa ahlukahlukene eduze kwemizila yawo, okungaba nomthelela omkhulu ekwakhiweni kwawo nokuhlala kwawo.
Amasistimu we-Exoplanet kanye ne-nomenclature
Ama-exoplanets aqanjwa ngokwesimiso esithile esisekelwe egameni lenkanyezi ayizungezayo kanye nohlamvu oluncane olubonisa ukuhleleka kokutholakala. Ngakho-ke, iplanethi yokuqala etholakala eduze kwenkanyezi ithola uhlamvu "b", olandelayo "c", njalonjalo. Isibonelo, "51 Pegasi b" ikhombisa i-exoplanet yokuqala etholakala eduze kwenkanyezi engu-51 Pegasi. Kumasistimu anezinkanyezi eziningi noma ukulungiselelwa okukhethekile, igama legama lingafaka osonhlamvukazi benkanyezi kanye nezinhlamvu ezincane zamaplanethi, ukwengeza noma ukususa izinhlamvu ngokufanelekile.
Amanye ama-exoplanet aphinde athole iziteketiso ezidumile noma amagama angakahleleki, kodwa i-International Astronomical Union (IAU) ibona kuphela amagama amisiwe kumakhathalogi ayo ukuze kugcinwe ukuhleleka kwamazwe ngamazwe nokungaguquguquki.
Atholakala kuphi ama-exoplanets? Ukusabalalisa emthaleni
Ama-exoplanets atholakele kuze kube manje asatshalaliswa kuyo yonke i-Milky Way, nakuba iningi liseduze nesimiso sethu sonozungezilanga. Lokhu ngokwengxenye kungenxa yemikhawulo yobuchwepheshe kanye nokukhetha kokuqaphela: kulula kakhulu ukuthola amaplanethi aseduze noma azungeza izinkanyezi ezikhanyayo ezifana nelanga.
Nokho, yonke imininingwane ikhomba ukuthi ama-exoplanet maningi kakhulu emthaleni wethu. Kulinganiselwa ukuthi kungase kube amashumi ezigidigidi zamaplanethi ku-Milky Way, amaningi awo angakaze abonakale. Izibalo zokuqala ezivela kumishini ye-Kepler ziphakamisa ukuthi okungenani inkanyezi eyodwa kweziyisithupha ezifana neLanga ineplanethi elingana noMhlaba emzileni wayo. Ezinye izifundo ziphakamisa lesi silinganiso, ikakhulukazi phakathi kwezinkanyezi ezincane nezipholile, njengama-red dwarfs.
Ama-exoplanet amaningi aziwayo atholakala ezinhlelweni zamaplanethi ezinenkanyezi eyodwa, kodwa amaplanethi aphinde akhonjwa ezinhlelweni ezinambambili, ezintathu, ngisho nezine, kanye nasezinhlelweni ezinamadiski e-protoplanetary asebenzayo.
Umkhathi we-Exoplanet kanye nosesho lwempilo
Enye yezinhloso ezinkulu zocwaningo lwe-exoplanetary ukuthola nokuhlaziya umkhathi wale mihlaba ekude. Ngokubheka izinto zokuhamba kanye nokuhlaziywa kwe-spectroscopic, kungenzeka ukutadisha ukwakheka kwezingqimba zangaphandle zamanye ama-exoplanets, ukuthola ukuba khona kwama-molecule afana namanzi, i-methane, isikhutha, i-sodium, kanye nama-biomarker angaba khona ahlobene nokuphila.
I-James Webb Space Telescope, kanye nezinye izinsimbi ezithuthukisiwe, yenza izinguquko ekufundweni komkhathi we-exoplanet, ikakhulukazi lawo osayizi woMhlaba. Eminyakeni ezayo, sithemba ukuhlonza ngokunembe kakhudlwana amaplanethi anezimo ezihambisana nokuphila ngokuhlaziya ukuthi kungenzeka yini ukuba khona kwamanzi awuketshezi, umoya-mpilo, noma i-methane emkhathini wawo.
Kuze kube manje, azikho izimpawu zokuphila ezingaguquki ezitholiwe kunoma iyiphi i-exoplanet, kodwa ukutholakala kwemihlaba etholakala endaweni okuhlalwa kuyo futhi enesimo sezulu esithakazelisayo kuyaqhubeka nokubhebhethekisa okulindelwe ososayensi.
Indawo okuhlalwa kuyo: Yini eyenza ibe ekhethekile?
Indawo okuhlalwa kuyo indawo ezungeze inkanyezi lapho izimo zokushisa nemisebe zingavumela ukuba khona kwamanzi awuketshezi ebusweni beplanethi. Okungukuthi, alisondele kakhulu (lapho ukushisa bekuzohwamukisa khona amanzi) noma kude kakhulu (lapho bekungaba yiqhwa). Indawo okuhlalwa kuyo iyahlukahluka kuye ngohlobo nosayizi wenkanyezi. Kuwumqondo oyisisekelo ekufuneni ukuphila, nakuba kungaqinisekisi ukuthi iplanethi iyakwazi ukuhlalwa, njengoba kuvela ezinye izici, njengokubunjwa komkhathi, ukuba khona kwezinyanga, ukuqhuma kwentaba-mlilo, noma amandla kazibuthe.
Iningi lama-exoplanet okungenzeka kuhlalwe kuwo atholakele kuze kube manje atholakala endaweni okuhlalwa kuyo yezinkanyezi zawo, nakuba iningi liselikhulu kakhulu, lishisa, noma linendawo emkhathini engafanele ukusekela ukuphila okufana noMhlaba.
Ama-exoplanets afakiwe kanye namakesi e-paradigmatic
Emashumini ambalwa eminyaka adlule, ama-exoplanet ahlaba umxhwele ahlonziwe ngenxa yezimpawu zawo, umlando, noma indawo engaba khona yokuhlala. Ezinye ezidume kakhulu ocwaningweni lwesayensi nasekusatshalalisweni yilezi:
- 51 Pegasi b: I-exoplanet yokuqala yathola ukuzungeza inkanyezi njengeLanga. “IyiJupiter eshisayo,” inkulu kakhulu kunoMhlaba futhi iseduze kakhulu nenkanyezi yawo.
- Isiqephu 12b: I-exoplanet enamatshe, ecishe ibe nkulu kunoMhlaba, ithole ibanga elingama-light-year angu-40 futhi itholakala endaweni okuhlalwa kuyo inkanyezi. Ukuba seduze kwayo kuyenza ibe yimpokophelo ebalulekile yokubhekwa kwesikhathi esizayo.
- I-Trappist-1e: Iyingxenye yohlelo lwama-exoplanet angangoMhlaba ayisikhombisa azungeza inkanyezi encane, epholile kakhulu. Eziningana zitholakala endaweni okuhlalwa kuyo.
- I-Kepler-22b: Enye yama-exoplanets okuqala atholakala endaweni okuhlalwa kuyo yenkanyezi efana neLanga.
- U-Proxima Centauri b: I-exoplanet eseduze kakhulu noMhlaba, etholakala endaweni okuhlalwa kuyo ye-dwarf ebomvu (i-Proxima Centauri), nakuba ukuhlala kwayo kwangempela kusaphikiswana ngakho.
- KOI-4878.01, K2-72 e, Wolf 1061 c kanye ne-GJ 3323 b: Izibonelo zamaplanethi anamaphesenti aphezulu afana nomhlaba, okuwenza abantu abathakaselayo ngokukhethekile ekusesheni ukuphila kwangaphandle komhlaba.
Izigaba ezikhethekile zama-exoplanets
Izinhlobonhlobo ezinkulu zama-exoplanets ziholele ekwakhiweni kwezigaba ezingezansi ukuchaza imihlaba enezici ezithile. Ezinye ezithakazelisa kakhulu yilezi:
- Amaplanethi e-Pulsar: Azungeza izinkanyezi “ezifile,” njengama-pulsars, akhipha imisebe evamile. Babengama-exoplanets okuqala aqinisekisiwe, nakuba indawo enenzondo yama-pulsars ibenza bangafaneleki ukuphila.
- Amaplanethi ekhabhoni noma ensimbi: Imihlaba enezingqimba eziningi zekhabhoni noma zensimbi, ehluke kakhulu kumaplanethi ajwayelekile esimiso sonozungezilanga.
- Amaplanethi e-Lava: Ngobuso obuncibilikisiwe ngenxa yokuba seduze kakhulu nenkanyezi yayo.
- Amaplanethi olwandle: Imizimba cishe imbozwe ngokuphelele ngamanzi awuketshezi.
- I-Megalands: Amaplanethi anamadwala anoquqaba olukhulu kakhulu kunoMhlaba, okuwabeka phakathi kwemidondoshiya emikhulu negesi.
- Amaplanethi ajikelezayo: Zungeza izinkanyezi ezimbili ngesikhathi esisodwa, okufana nalokho okubonwa endaweni edumile ye-Star Wars enamalanga amabili emkhathizwe.
- Amaplanethi azulazulayo: Azizungezi noma iyiphi inkanyezi, kunalokho zihamba zodwa kuwo wonke umthala.
Imishini, amaphrojekthi, kanye nezibonakude ekusesheni ama-exoplanets
Ukuhlola i-Exoplanet kungenye yezinkambu ezisebenza kakhulu neziyinkimbinkimbi yesayensi yezinkanyezi namuhla. Izibonakude eziningi ezisekelwe phansi nezisekelwe emkhathini, kanye nemishini yamazwe ngamazwe, zinikezelwe ekusesheni nasekufundeni imihlaba emisha engaphandle kwesimiso sonozungezilanga:
- I-Kepler Mission (NASA): Yethulwa ngo-2009, iguqule ukusesha ama-exoplanets isebenzisa indlela yezokuthutha. Ithole izinkulungwane zabazokhethwa futhi yanikeza idatha ebalulekile yocwaningo lwemvamisa ye-exoplanet nokuhlukahluka.
- I-James Webb Space Telescope (NASA/ESA/CSA): Kusukela ngo-2022, ibivula imingcele emisha ocwaningweni lwemikhathi yeplanethi kanye nokuchazwa okuningiliziwe kwama-exoplanets angamadwala.
- I-TESS Mission (NASA): Ukulandela i-Kepler, icinga ama-exoplanets aseduze, izinkanyezi ezikhanyayo, ezilungele ukutadisha nezinye izinsimbi.
- Iphrojekthi ye-PLATO (ESA): Ihlelelwe u-2026, izogxila ekusesheni ama-exoplanets angamatshe endaweni okuhlalwa kuyo yezinkanyezi eziseduze.
- I-COROT Mission (CNES/ESA): Yethulwa ngo-2006, yaqala ukusetshenziswa kwendlela yokuthutha emkhathini.
- IZIBONAKALISO ZOMHLABA: Izakhiwo ze-iconic ezifana ne-Very Large Telescope (VLT), i-Keck, i-E-ELT yesikhathi esizayo, ne-GMT, phakathi kwezinye, zidlala indima ebalulekile ekutholweni nasekuhlaziyweni kwe-spectroscopic yama-exoplanet.
Ngaphezu kwalokho, kunamaphrojekthi amaningi anikezelwe ekuthuthukiseni izinsimbi nezindlela zokubuka, njenge-HARPS, i-HATNet, i-WASP, i-OGLE, i-SPECULOOS, phakathi kwabanye, eqhubeka nokwandisa ikhathalogi ye-exoplanet futhi icwengisise ulwazi olutholakalayo mayelana nabo.
Izinselelo zokuhlala kanye nokufuna ukuphila
Ukutholakala kwama-exoplanets endaweni okuhlalwa kuyo izinkanyezi zawo kudala isithakazelo esikhulu, kodwa ukuphila kwangempela kwale mihlaba kuncike ezintweni eziningi. Ngaphezu kwezinga lokushisa elifanele, kubalulekile ukucabangela ukwakheka nokuminyana komkhathi, ukuba khona kwamanzi awuketshezi, umsebenzi we-tectonic, indawo kazibuthe, nokuzinza kwe-orbit, phakathi kwamanye amapharamitha. Amaplanethi amaningi okuhlalwa kuwo angase angakwazi ukuhlalwa kuwo ngenxa yezimo ezimbi kakhulu, umkhathi onobuthi, noma ukungabikho kwezakhi ezibalulekile zokuphila njengoba sikwazi.
Naphezu kwalokhu, ucwaningo lwama-exoplanets luvula amafasitela amasha olwazi mayelana nendlela izimiso zamaplanethi ezakha futhi ziguquke ngayo, ukuthi ukuphila kusakazwa kanjani endaweni yonke, nokuthi yiziphi izimo ezingavumela ukuvela kwako.
Umthelela wamasiko nomphakathi wama-exoplanets
Ukutholakala kwamaplanethi ngale kwesimiso sonozungezilanga kuye kwaphawula ngaphambi nangemuva kwendlela abantu abayiqonda ngayo indawo yethu endaweni yonke. Iqiniso nje lokuthi imihlaba engase ifane noMhlaba ikhona, enolwandle, umkhathi, namazinga okushisa afanayo, iphakamise izigidi zemibuzo mayelana nokwenzeka kokuphila kwamanye amazwe kanye nokwehlukahlukana kwezindawo ezisemkhathini.
Ngaphezu kwalokho, ama-exoplanets akhuthaze ababhali bezinganekwane zesayensi ezingenakubalwa, abenzi bamafilimu, nabadali, abaye bacabanga ngempucuko ethuthukisiwe, ukuhamba phakathi kwezinkanyezi, namaqiniso amasha okuhlaleka, njengoba kubonakala kumafilimu ayisakhiwo sodumo afana ne-"Interstellar."
Ekugcineni, ama-exoplanets awashintshi isayensi kuphela, kodwa futhi nomcabango ohlangene kanye nokuzindla ngekusasa lesintu.
Ikusasa lokuhlola i-exoplanet
Ucwaningo lwe-Exoplanet luyadlondlobala, futhi okutholakele okumangazayo nakakhulu kulindeleke ukuthi kuvele eminyakeni ezayo. Ukuthuthukiswa kwemishini yasemkhathini ezinikele, ukuzwela kwesibonakude okuthuthukisiwe, kanye nokusetshenziswa kobuhlakani bokwenziwa ekuchazeni idatha kuzokwenza kube nokwenzeka ukuhlonza amaplanethi ayanda abe mancane, ukuhlaziya ngokunembile umkhathi, futhi mhlawumbe nokuthola, ngokokuqala ngqa, umkhondo wokuphila ngokungananazi endaweni yonke.
Ucwaningo lwama-exoplanets luzoqhubeka nokuguqula ukuqonda kwethu i-astrophysics, biology, nefilosofi, ukushayela intuthuko yesayensi nezobuchwepheshe ngokusebenzisa izinhlelo zokusebenza ezingalindelekile Emhlabeni nangale kwayo.
Namuhla, uhlu lwama-exoplanet lukhula isonto nesonto, ngama-ejensi asemkhathini, izibonakude ezizenzakalelayo, nemiphakathi yezinkanyezi ezifunda ngezinkanyezi esebenza ndawonye ukuze andise imingcele yolwazi lomuntu ngale kwesistimu yethu sonozungezilanga.
Ukuhlola ama-exoplanets kuye kwamelela ukugxuma okukhulu endleleni isintu esibheka ngayo indawo yonke. Kusukela ekutholweni kokuqala ngeminyaka yawo-1990s kuya ekusetshenzisweni kwezinsimbi ezifana ne-James Webb, isayensi ibonise ukuthi amaplanethi angaphezulu kakhulu kokuvela okuyivelakancane: ayinto evamile emthaleni. I-exoplanet ngayinye etholiwe ivula ithuba elisha lokuphila, ulwazi, nokuqonda indawo yethu endaweni yonke. Ikusasa lithembisa izimanga eziningi nakakhulu njengoba imingcele yesayensi iqhubeka nokukhula ukuze iveze izimfihlakalo zale mihlaba ekude nethakazelisayo.
