Rangarira ndima iri pasi apa uye ipapo pindura mubvunzo gare gare mumutauro mumwe chetewo sechikamu:  Passage: Kusvika pari zvino masayendisiti anoziva boka rimwe chete rezvinhu zvomugungwa zviri paumbriel<unk>craters. Pamusoro peUmbriel pane makomba akawanda uye akakura zvikuru kupfuura ari pana Ariel neTitania. Inoratidza chiitiko chiduku zvikurusa chegeological. Kutaura zvazviri, pakati pemwedzi yaUranus, Oberon chete ndiyo ine mapako akawanda kupfuura Umbriel. Dhayamita yemakomba akacherekedzwa anotangira pamakiromita mashomanana kumugumo wakaderera kusvika pamakiromita 210 nokuda kwemakomba makuru anozivikanwa, Wokolo. Makomba ose anozivikanwa ari paUmbriel ane makomo ari nechepakati, asi hapana makomba ane mabara. Pedyo neEquator yeUmbriel pane chinhu chinonyanya kuoneka: gomo reWunda, rine dhayamita inenge makiromita 131. Wunda ine mhete huru yezvinhu zvinopenya pasi payo, iyo ingava nhumbi dzokuputika kana kuti nhumbi dzechando checarbon dioxide. Pedyo napo, panoonekwa pamwe chete neTerminator, pane craters Vuver naSkynd, dzisina micheto yakajeka asi dzine misoro yakajeka iri pakati. Kudzidzwa kwemapurani emativi eUmbriel kwakaratidza kuti pane chinhu chikuru chinogona kuitika chine dhayamita inenge makiromita 400 uye kudzika kwemakiromita anenge mashanu. Kufanana nemamwe mwedzi yaUranus, pamusoro peUmbriel pane makoronga anoenda kuchamhembe kwakadziva kumabvazuva. Zvisinei, hazvizivikanwi zviri pamutemo pamusana pekushomeka kwemifananidzo uye kutaridzika kwakanaka kwemwedzi uyu, izvo zvinotadzisa kugadzira mepu dzezvakatipoteredza. Nzvimbo yeUmbriel yakanyatsogadziriswa yakanyatsogadzikana kubvira panguva yeLate Heavy Bombardment. Zviratidzo bedzi zvebasa romukati rakare makoronga namapolgoni akasviba - mavara akasviba ane zvimiro zvakaoma kuyera kubva pamakumi kusvika kumazana amakiromita. Mapolygon aya akaonekwa kubva pamifananidzo yakaitwa neVoyager 2 uye anoparadzirwa zvakaenzana pamusoro peUmbriel, achinanga kuchamhembe kwakadziva kumabvazuva achienda kumaodzanyemba kwakadziva kumadokero. Mamwe mapolygon anoenderana nemakomba akadzika makiromita mashomanana uye angave akagadzirwa munguva yokutanga yebasa rokugadzira matongo. Pari zvino hapana tsananguro yokuti nei Umbriel ari murima uye akafanana pakuonekwa. Pamusoro payo panogona kuvharwa nechikamu chakatetepa chechinhu chakasviba (chinonzi umbral material)...  Mubvunzo: Chii chinonzi gomba guru rinozivikanwa riri paUranus?
Wokolo