Rịba ama amaokwu a dị n'okpuru ma zaa ajụjụ ahụ mgbe e mesịrị n'otu asụsụ ahụ dị ka amaokwu ahụ:  Passage: Cygnus X-1 (abbreviated Cyg X-1) bụ galactic X-ray isi iyi na ìgwè kpakpando Cygnus, na mbụ dị otú ahụ isi iyi n'ọtụtụ ebe nabatara ịbụ a black oghere. Achọpụtara ya n'afọ 1964 n'oge ụgbọelu na-efe efe ma bụrụ otu n'ime isi mmalite X-ray kachasị ike nke a hụrụ site na Earthwa, na-emepụta oke oke X-ray flux density nke 2.3 × 10−23 Wm−2 Hz−1 (2.3 × 103 Jansky). Ọ ka so n'ihe ndị a kasị amụ banyere mbara igwe n'ụdị ya. A na-eme atụmatụ ugbu a na ihe ahụ dị nro nwere ihe dị ka okpukpu 14.8 nke ịdị arọ nke Sun ma gosipụta na ọ dị oke obere ịbụ ụdị kpakpando ọ bụla a maara, ma ọ bụ ihe ọzọ nwere ike ịbụ ihe ọzọ na-abụghị oghere ojii. Ọ bụrụ otu ahụ, radius nke ihe omume ya nwere 300 km "dị ka oke elu na oke oke nke mpaghara isi mmalite" nke oge X-ray na-adịgide naanị ihe dịka 1 ms. Cygnus X-1 bụ nke usoro X-ray dị elu, nke dị ihe dịka 6,070 afọ ìhè site na Sun, nke gụnyere kpakpando na-agbanwe agbanwe na-acha anụnụ anụnụ nke a na-akpọ HDE 226868 nke ọ na-agba gburugburu ihe dịka 0.2 AU, ma ọ bụ 20% nke anya site na Earth ruo Sun. Ifufe kpakpando sitere na kpakpando ahụ na-enye ihe maka diski mgbakọta gburugburu isi iyi X-ray. A na-eme ka ihe dị n'ime diski ahụ dị ọkụ ruo ọtụtụ nde degrees, na-eme ka ụzarị ọkụ X ndị a na-ahụ anya pụta. Otu ụzọ ụgbọelu, nke a haziri n'ụzọ kwụ ọtọ na diski ahụ, na-ebute akụkụ nke ike nke ihe na-adaba n'ime mbara igwe. Usoro a nwere ike ịbụ nke otu kpakpando a na-akpọ Cygnus OB3, nke ga-apụta na Cygnus X-1 dị ihe dị ka nde afọ ise ma mepụta ya site na kpakpando progenitor nke nwere ihe karịrị 40 solar masses. Ihe ka ukwuu n'ihe ndị dị n'ime kpakpando ahụ gbapụrụ, ikekwe dị ka ifufe kpakpando. Ọ bụrụ na kpakpando a gbawara mgbe ahụ dị ka nnukwu kpakpando, ọ ga-abụrịrị na ike nke gbawara ya mere ka ihe ahụ fọdụrụnụ si n'usoro ihe ahụ pụọ. Ya mere, kpakpando ahụ nwere ike ịdaba ozugbo n'ime oghere ojii. Cygnus X-1 bụ isiokwu nke egwuregwu sayensị enyi na enyi n'etiti ndị ọkà mmụta sayensị Stephen Hawking na Kip Thorne na 1974, ebe Hawking na-agba nzọ na ọ bụghị oghere ojii. O kwetara na ọ bụ ya gbara ya na 1990 mgbe o nyochara ihe ndị ọ chọpụtara...  Ajụjụ: Olee ebe e si enweta ụzarị ọkụ nke a na-ewere dị ka oghere ojii mbụ a chọpụtara?
Cygnus X-1