Gravitational Collapse - Model
To model gravitational collapse.
Mounted post with circular magnets.
Ring magnets are placed around the vertical rod with similar poles adjacent to each other. As more magnets are piled on, the weight of the magnets overcomes the opposing gravitational force, eventually causing "gravitational collapse."
Geoffrey T. Fox, Minimum Mass of a Neutron Star from the Semi-Empirical Mass Formula, AJP 41, 130-131 (1973).