Kwiiplanethi ezincinanana: iPluto, Eris, Makemake, Haumea

yiplanethi encinane okunene akazange khona de kwango-2006. Emva koko sele inikezelwe kwiklasi entsha yezinto emhlabeni. Injongo yale nguquko ukusungulwa njengomthetheli phakathi iiplanethi ezinkulu izijikelezi ezininzi ukuthintela ukudideka amagama kwamaziko amatsha kunye be ekhethiwe ngaphaya kweneptune.

definition

Ngoko, kwi sele kude 2006, intlanganiso rhoqo IAU (International Astronomical Union). Kwi-ajenda yaba umbuzo yokucacisa ngemeko iPluto. Ngexesha leengxoxo kwagqitywa ukuphucwa of "irenki" iplanethi lesithoba. Mac lenze iinkcazelo zezinto ezithile isithuba:

• Planet - umzimba Bajikeleza Sun, omkhulu ngokwaneleyo ukuba ukugcina lwesilinganiso hydrostatic (oko kukuthi ukuba imilo ngeenxa) kunye yokungcwalisa orbit nezinye izinto.
• Ibhanti - umzimba kugxile iLanga, leyo inobunzima encinane, nto leyo ayikuvumeli ukuba ukufumana ukulingana hydrostatic.
• yiplanethi encinane - umzimba Bajikeleza Sun exhasa lwesilinganiso hydrostatic, kodwa hayi omkhulu, ukuze uvule komzila.

Phakathi wamva waza wathabatha iPluto.

Isimo esitsha

IPluto kwakhona zihlelwa njengezinto yothutho-Neptunian. Njengabathile kwiiplanethi ezincinanana, libhekisela imizimba Kuiper Belt. Le umfutho ngokutsha isimo iPluto kwakhokelela ekubeni ezifunyaniswe ezininzi ngayo izinto kule ndawo ekude yenkqubo elanga. Phakathi kwabo kwakukho Eris, iPluto mkhulu ubunzima nge-27%. Ngu-logic onke la maqela kufuneka ukuze sibenokubizwa njengendawo iplanethi. Kungenxa yoko le nto kwagqitywa ukuhlaziya ucacise nokuzimisela bezinto indawo enjalo. Kwaye kwakukho kwiiplanethi ezincinanana.

yeshumi

"Yehlisa elikwinqanaba" iPluto nje kuphela. Eris ukuya kwintlanganiso Mac ngo-2006, yafunwa ukuba 'isihloko' lo mhlaba yeshumi. Ungcono iPluto ngokobunzima, kodwa obuphantsi kuye ubukhulu. Eris yafunyanwa ngo-2005 ngu izazi zaseMelika inxaxheba khangela izinto yothutho-Neptunian. Ntlandlolo kwathiwa Xenu okanye Xena, kodwa kamva waqalisa ukusebenzisa igama yangoku.

Eris, njengezinye kwiiplanethi ezincinanana wezijikelezi zalo, ukuba abe lwesilinganiso hydrostatic, kodwa ayikwazi ukususa orbit yezinye imizimba yesiqalo.

I yesithathu kuluhlu

Le elandelayo inkulu emva iPluto kunye Eris, Makemake na. Le yinto ezaziwa i Kuiper Belt. Ibali umdla ligama kulo mzimba. Njengesiqhelo, emva kokufunyanwa yena wawongwa 2005 Inombolo fy _9. Kangangexesha elide, iqela izazi yaseMelika eyafumana Makemake, ebizwa ngalo phakathi kwabo, 'ngomvundla weIsta "(Ukufunyanwa kwenziwa kwiintsuku ezimbalwa emva kokuba iholide).

Ngowe-2006, xa kukho ikholam entsha "yiplanethi encinane of the System Solar" kwi Ulwahlulo, kwagqitywa ekubeni ukufowunela 2005 fy ₉ ngenye indlela. Ngenxa yesithethe, izinto Kuiper Belt classical zithiywe oothixo enxulumene indalo. Maka-Maka - umdali yoluntu neentsomi ka izizwana-Nui, abemi yokuqala ka-Easter Island.

Haumea

kwiiplanethi ezincinanana kwenkqubo elanga zibandakanya izinto enye yothutho-Neptunian. It Haumea. main osemqoka Its - ujikeleziso ngokukhawuleza kakhulu. Haumea le parameter ngaphambi zonke izinto owaziwa ububanzi of abangaphezu kwamakhulu leemitha kwinkqubo yethu. Phakathi kwiiplanethi ezincinanana injongosenzi yeyona inkulu yesine.

Ceres

Enye umzimba engaphandle yelo eklasini ibekwe engundoqo ibhanti ke, ilitye, edulusele phakathi umzila kaZeyus ne Mars. Lo eCeres. Kwaba zivulwe ekuqaleni kuka-1801. Kangangexesha elithile njengento planet yinxalenye. Kwaye ngo 1802, zibangelwa izijikelezi-Ceres. status umzimba cosmic iye yahlaziywa ngo-2006.

yiplanethi encinane evela kubamelwane zayo ezinkulu ziyahluka ikakhulu ekungakwazini ukususa orbit yayo kwezinye amaqumrhu kunye nobutyobo. Indlela elula ukusebenzisa le ezintsha, kuba kunzima ukutsho ngoku - ixesha liya kukuxelela. Ukuza kuthi ga ngoku, kubekho iingxoxo ezincinci yamane kuphela malunga iPluto akayi kuhla- ukwehlisela. Nangona kunjalo, ixabiso owayesakuba planethi yesithoba kunye namaqumrhu efanayo kweyobunzululwazi ihlala phezulu kungakhathaliseki ukuba zibizwa.