  Trace charge imbalances can explain puzzling cosmological observations such
as the large `missing' fraction of electrons in cosmic rays and their contrast
to the charge-neutral solar wind, the extreme energy sources that sustain
pulsars, quasars, galactic jets and active galactic nuclei (AGN), the origin
and nature of `dark matter' galaxy haloes, and the apparent acceleration of the
expansion of the Universe. When there are $\sim \num{9e-19}$ amounts of excess
$\ce{H3+}$ or $\ce{H-}$ within cold diffuse clouds of $\ce{H2}$, residual
repulsive Coulomb forces between these few unbalanced charges are comparable to
the gravitational attractions between the many nucleons. Thus, trace-charged
dark matter is inert with respect to static electrogravitional
self-attractions, but responds to electromagnetic fields and gravitational
attractions with uncharged matter. Trace charge is also the ionic catalyst that
keeps dark matter in the state of unseen clouds of cold molecular hydrogen plus
trace $\ce{H3+}$. Once warm enough to partially ionize, bright matter
preferentially expels its net charge to become nearly charge-neutral. Planets
surrounding stars become charge neutral as they bathe in a charge-neutral
stellar wind. In contrast, around trace-charged AGNs, black holes, and
pulsars,newly ionized protons along with a significant fraction of entrained
dark matter are Coulomb-expelled to relativistic velocities in polar jets.
Extrasolar cosmic rays generated by these would be strongly proton-dominated,
as observed. Initial trace charge imbalances could originate at the onset of
the the Big Bang by segregation of an electron-rich shell to peripheral
expanding matter of the Universe.
