Why is mystery object Cygnus X-3 so bright? Astronomers may now have the answer

The X-ray-emitting binary system Cygnus X-3 features a massive Wolf-Rayet star donating matter to a compact object, probably a black hole.

The post was publish in first on this website : https://www.space.com/cygnus-x-3-binary-system-brightness-mystery-solved