Cygnus X-1 (gajarta Cygnus X-1) ne galactic X-ray tushen a cikin constellation Cygnus, da kuma na farko da irin wannan tushen da aka yarda da su zama baki rami. An gano a 1964 a lokacin wani roka jirgin da kuma shi ne daya daga cikin karfi X-ray tushen gani daga Duniya, samar da wani ganiya X-ray yawa na 2.3 × 10−23 Wm−2 Hz−1 (2.3 × 103 Jansky). Ya kasance daga cikin mafi yawan karatu astronomical abubuwa a cikin aji: Passage: Cygnus X-1 (gajarta Cygnus X-1) ne a yanzu kiyasta ya zama wani taro game da 14.8 sau da yawa na Sun da aka nuna ya zama ma kananan ya zama wani irin al'ada star, ko wata ila abu baicin wani baki rami. Idan haka ne, da radius na sararin samaniya yana da 300 digiri sama da layin na wucin gadi X-ray jets a lokacin da ake kira H-1?
Cygnus X-1