Microquasar GRO J1655-40 = Black Hole & Companion Star - YouTube

https://www.youtube.com/watch?v=Q3Vn31Ik88k

GRO J1655-40 is the second so-called 'microquasar' discovered in our Galaxy. Microquasars are black holes of about the same mass as a star. They behave as sc...