OF NEUTRAL MATTER:
matter exerts REPULSION. Non-stellar matter exerts GRAVITATION.
There exist a third kind of matter, which exerts no force
to influence external bodies. This is NEUTRAL MATTER (NM),
which is discovered by authors. The so called "DARK-MATTER"
is neutral matter. Most of the void spaces and centre of galaxies
are filled with NM. Some astronomical bodies are constituted
by neutral matter.