Xiddigaha nooca G-ka ah ee taxanaha ugu weyn ayaa isku daraya hydrogen muddo ku dhow 10 bilyan oo sano, illaa ay ka dhammaato bartamaha xiddigga. Marka ay tani dhacdo, xiddiggu wuxuu ballaariyaa xajmiga hore oo wuxuu noqonayaa xiddig weyn oo cas, sida Aldebaran (ama Alpha Tauri). Ugu dambeyntii xiddigga weyn ee cas wuxuu daadiyaa lakabkiisa dibedda ee gaaska, kaas oo noqonaya nebula planetary ah, halka nuxurka si deg deg ah u qaboojiyaa oo u soo jiidata midab isku dhafan oo cufan oo cad. Su'aal: Xiddiga nooca G-ka ah ayaa isku daraya shayga?
hydrogen (haydrojini)