  The finding of an unexpectedly large source of energy from repulsive
interactions between neutrons in the 2,850 known nuclides has challenged the
assumption that H-fusion is the main source of energy that powers the Sun and
other stars. Neutron repulsion in compact objects produced by the collapse of
stars and collisions between galaxies may power more energetic cosmological
events (quasars, gamma ray bursts, and active galactic centers) that had been
attributed to black holes before neutron repulsion was recognized. On a
cosmological scale, nuclear matter cycles between fusion, gravitational
collapse, and dissociation (including neutron emission) rather than evolve in
one direction by fusion. The similarity Bohr noted between atomic and planetary
structures may extend to a similarity nuclear and stellar structures.
