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. [1]Nhazi usoro bụ usoro ebe oke mpaghara dị n'ime igwe ojii dị n'ime oghere interstellar, nke a na-akpọ mgbe ụfọdụ dị ka "ebe a na-ahụ maka nhazi" ma ọ bụ "mpaghara na- , daa wee àgwà. [1] Dị ka ngalaba nke mbara igwe, njikọ njikọ nke interstellar medium (ISM) na nnukwu igwe ojii molecular (GMC) dị ka ihe na-ebute usoro mgbasa ozi, na mkpa nke protostars na ihe ndị na-eto eto dị. Ntụgharị ya. O nwere njikọ chiri anya na nhazi mbara ala, ngalaba ọzọ nke mbara igwe . Theory formation Star, yana ịza asị maka nguzobe nke otu egwuregwu, ọnụkwa ịdekọ ọnụ ọgụgụ nke ọnụọgụ abụọ na mbụ mbụ mass . Ụtụtụ Stakpọ etolite iche mana dịka nke nke otu ndị na-akpọ mkpà ma ọ bụ eje ozi
Ụyọkọ ndị na-agba agba dị ka Milky Way nwere ike, ihe na mbara igwe, na ikuku gas na uzuzu dị iche iche (ISM). Ndị na-ahụ maka interstellar nwere 104 ruo 106 particles kwa cm3, ọ na-ese nke 70% hydrogen, 28% helium, na 1.5% ihe dị arọ site na oke. Achọpụtara ọtụtụ ihe ndị dị arọ ka a na-ahụ n'ime akwụkwọ site na nucleosynthesis stellar wee chụpụ ka iwe na-agafe na njedebe nke usoro ha. mgbaàmà dị elu nke interstellar ọkara ụdị igwe ojii, ma ọ bụ na-agbasa nebulae, [1] ebe nguzobe ozi na-ewere ọnọdụ.[2] N'aká ka mole ndị gbara, mole ndị elliptical na-efunahụ pụtara oyi na-atụ [nkọwa dị mkpa] nke etiti etiti ya n'ime ihe dị ka otu esemokwu awụ, nke na--Man-ama elliptical na-efunahụ . agbasa ma e wezụga site na iji ike na-agụ ndị ọzọ..
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