Kimberly S. Adams, Argyle Middle School, Silver Spring, MD
Astronomy 10 learning goal Q10.3
Simple model of mass transfer from a giant/supergiant to a black hole.   Conservation of angular momentum from the orbits of this binary system results in the mass transferred from the giant/supergiant forming an accretion disk around the black hole, rather than falling "straight in."
European Space Agency
Astronomy 10 learning goal Q10.1
Short movie clip illustrating how the mass of a black hole and the masses of stars "warp" a two-dimensional model of spacetime.   This "warpage" is what is experienced as gravity--no gravitational forces, spacetime is "smooth," stronger and stronger gravitational forces correspond to stronger and stronger "distortions" in spacetime.