Cygnus X is a well-known binary star system located in the constellation Cygnus. It consists of a massive star and a compact object, which is believed to be a black hole. This system is notable for its strong X-ray emissions, making it one of the brightest X-ray sources in the sky. The compact object in Cygnus X pulls material from its companion star, creating an accretion disk. As the material spirals inwards, it heats up and emits X-rays. This process allows astronomers to study the properties of black holes and the dynamics of binary systems.