Rịba ama amaokwu a dị n'okpuru ma zaa ajụjụ ahụ mgbe e mesịrị n'otu asụsụ ahụ dị ka amaokwu ahụ:  Passage: N'afọ 2001, nchọpụta na X-ray wavelengths site na Chandra X-ray Observatory kpughere ọnụnọ nke gas dị oke ọkụ n'ime NGC 6543 na okpomọkụ nke 1.7×106 K. A na-eche na gas dị oke ọkụ na-esite na mmekọrịta dị ike nke ifufe kpakpando ngwa ngwa na ihe e wepụrụ na mbụ. Mmekọrịta a emewo ka oghere dị n'ime nebula ahụ gbapụ. Nnyocha Chandra mekwara ka a mata ebe isi iyi dị n'ebe kpakpando nke dị n'etiti nọ. Akụkụ nke isi iyi a gbatịrị ruo akụkụ siri ike nke ụzarị X, ruo 0.5<unk>1.0 keV. A na-atụghị anya na kpakpando nwere okpomọkụ photospheric nke ihe dị ka 100000 K ga-ewepụta ike na ụzarị ọkụ X siri ike, yabụ ọnụnọ ha bụ ihe omimi. Ọ pụrụ igosi na e nwere diski na-agbakọta n'ebe e nwere okpomọkụ dị elu n'ime usoro kpakpando abụọ. Ihe data X-ray siri ike ka na-adọrọ mmasị karịa afọ iri ka e mesịrị: Anya Cat gụnyere na nyocha Chandra nke 2012 nke kpakpando 21 nke mbara igwe (CSPNe) na agbata obi anyanwụ, nke chọpụtara: "Ihe niile ma e wezụga otu n'ime isi mmalite X-ray achọpụtara na CSPNe gosipụtara X-ray spectra nke siri ike karịa ka a na-atụ anya ya site na ọkụ (~100000 K) kpakpando kpakpando dị n'etiti, nwere ike igosi nnukwu ugboro nke ndị enyi abụọ na CSPNe. Ihe ndị ọzọ a pụrụ ịkọwa gụnyere ifufe ndị na-ama jijiji n'onwe ha ma ọ bụ ihe ndị na-esi na PN apụta".  Ajụjụ: Gịnị ka Chandra X Ray Observatory kpughere?
mmeghachi omume siri ike nke ifufe kpakpando ngwa ngwa na ihe e wepụrụ na mbụ