  The self-gravitational correction to a localized spherically-symmetric static
energy distribution is obtained from energetically self-consistent upgraded
Newtonian gravitational theory. The result is a gravitational redshift factor
that is everywhere finite and positive, which both rules out gravitational
horizons and implies that the self-gravitationally corrected static energy
contained in a sphere of radius r is bounded by r times the fourth power of c
divided by G. Even in the absence of spherical symmetry this energy bound still
applies to within a factor of two, and it cuts off the mass deviation of any
quantum virtual particle at about a Planck mass. Because quantum uncertainty
makes the minimum possible energy of a quantum field infinite, such a field's
self-gravitationally corrected energy attains the value of that field's
containing radius r times the fourth power of c divided by G. Roughly
estimating any quantum field's containing radius r as c times the age of the
universe yields a "dark energy" density of 1.7 joules per cubic kilometer. But
if r is put to the Planck length appropriate to the birth of the universe, that
energy density becomes the enormous Planck unit value, which could conceivably
drive primordial "inflation". The density of "dark energy" decreases as the
universe expands, but more slowly than the density of ordinary matter
decreases. Such evolution suggests that "dark energy" has inhomogeneities,
which may be "dark matter".
