Cygnus contains Deneb (ذنب, translit. ḏanab, tail)one of the brightest stars in the night sky and the most distant first-magnitude staras its "tail star" and one corner of the Summer Triangle the constellation forming an east pointing altitude of the triangle. It also has some notable X-ray sources and the giant stellar association of Cygnus OB2. One of the stars of this association, NML Cygni, is one of the largest stars currently known. The constellation is also home to Cygnus X-1, a distant X-ray binary containing a supergiant and unseen massive companion that was the first object widely held to be a black hole. Many star systems in Cygnus have known planets as a result of the Kepler Mission observing one patch of the sky, an area around Cygnus.
Cygnus contains Deneb (ذنب translit ḏanab tail)one of the brightest stars in the night sky :and the most distant first-magnitude staras its "tail star" and one corner of the Summ:er Triangle the constellation forming an east pointing altitude of the triangle It also has some notable X-ray sources and the giant stellar association of Cygnus OB2 One of the stars of this association NML Cygni is one of the largest stars currently known The constellation is also home to Cygnus X-1 a distant X-ray binary containing a supergiant and unseen mass?ive companion that was the first object widely held to be a black hole Many star systems in Cygnus have known planets as a result o?f the Kepler Mission observing one patch of the sky an area around Cygnus