Hi! I'm Cygnus, the swan. I'm also referred to sometimes as the Northern Cross. I'm 2,500 light years from Earth, but still can be seen on clear nights in the Summer sky. 15,000 years ago a star in me blew up in a great supernova explosion that is still expanding till this day. The result was the Cygnus Loop, a spectacular show of light and power that spanned 6 times the diameter of Earth's moon at that time. Quite a show. I give off radiation and have 3 known blackholes: X-1, meaning the first source of X-rays, X-2, and X-3. These blackholes are invisible and cannot be seen by anyone. I consist of about 10 main stars, the biggest one called Deneb. My name is taken as a god, decribed as the "Bringer of Balance".