Cygnus constellation: Cygnus, 61 Cygni, Albireo, Cygnus X-1, List of stars in Cygnus, Cygnus Loop, 16 Cygni, Kepler-11b, Cygnus X-ray ring - Tapa blanda

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Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Pages: 50. Chapters: Cygnus, 61 Cygni, Albireo, Cygnus X-1, List of stars in Cygnus, Cygnus Loop, 16 Cygni, Kepler-11b, Cygnus X-ray ring, Kepler-11c, Kepler-11f, Kepler-11e, Cygnus Superbubble, Kepler-11d, SS 433, Cygnus X-7, Pulsar kicks, Veil Nebula, HD 188753, Cygnus X-4, 16 Cygni Bb, Deneb, Cygnus X-6, Cygnus XR-2, Cygnus XR-3, Kepler-6, Gliese 777, Kepler-5, Kepler-11g, Cygnus X-2, Cygnus XR-4, P Cygni, North America Nebula, Cygnus X-3, Delta Cygni, HAT-P-7b, Gliese 777 b, Cygnus A, HAT-P-11b, Messier 29, KOI-81, KOI-74, KY Cygni, Gamma Cygni, IC 5146, Chi Cygni, HD 187123 c, Zeta Cygni, Messier 39, Egg Nebula, Cygnus OB2-12, Epsilon Cygni, NGC 6946, Gliese 777 c, HD 187123 b, Pi2 Cygni, HD 185269, HD 203857, Omega² Cygni, Crescent Nebula, 52 Cygni, Cyg OB2 -8A, Pelican Nebula, AFGL 2591, HD 185269 b, Lynds 1014, Theta Cygni, Tau Cygni, V1500 Cygni, Kepler-5b, Kepler-6b, HD 197488, GJ 1245, WR 136, SAO 49986, Pi1 Cygni, NGC 7008, Tulip Nebula, Omicron2 Cygni, Gliese 806, HD 197036, 8 Cygni, SAO 49921, 39 Cygni, HD 197167, SAO 49991, SAO 49936, 3C 438, NGC 6866, SAO 50004, V1974 Cygni, NGC 6884, SAO 49910, V1057 Cygni, SAO 49951, SAO 49997, Sadr Region, M1-92, NGC 6819, V1668 Cygni, V476 Cygni, NGC 7048, Psi Cygni. Excerpt: Cygnus X-1 (abbreviated Cyg X-1) is a well-known galactic X-ray source in the constellation Cygnus. It was discovered in 1964 during a rocket flight and is one of the strongest X-ray sources seen from Earth, producing a peak X-ray flux density of 2.310 WmHz (2.310 Jansky). Cygnus X-1 was the first X-ray source widely accepted to be a black hole candidate and it remains among the most studied astronomical objects in its class. It is now estimated to have a mass about 8.7 times the mass of the Sun and has been shown to be too compact to be any known kind of normal star or other likely object besides a black hole. ...