  Observations are compared to conflicting predictions about self-gravitational
structure formation by the hydro-gravitational theory (HGT) of Gibson 1996-2003
versus cold-dark-matter hierarchical-clustering-cosmology (CDMHCC) and the
Jeans 1902 criterion. According to HGT, gravitational structures form
immediately after mass-energy equality by plasma fragmentation at 30,000 years
when viscous and weak turbulence forces first balance gravitational forces
within the horizon L_H = ct < L_J = c/[3\rho G]^1/2, contrary to the Jeans 1902
criterion. Buoyancy forces fossilize the 10^-12 s^-1 rate-of-strain and the
10^-17 kg m^-3 baryonic density. The non-baryonic dark matter (NBDM) diffuses
into the voids rather than forming cold-dark-matter (CDM) halos required by
CDMHCC. From HGT, supercluster-mass to galaxy-mass fragments exist at the
plasma to gas transition, and these fragment further to form
proto-globular-star clusters (PGCs) and planetary-mass primordial-fog-particles
(PFPs): the baryonic dark matter of the interstellar-medium and
inner-galaxy-dark-matter-halos, from which all planets and stars are formed by
accretion (Gibson 1996, Schild 1996). From HGT and a rich cluster mass profile
(Tyson and Fischer 1995), D_NBDM = 6 x10^28 m^2 s^-1, m_NBDM <= 10^-33 kg, and
the NBDM forms outer-galaxy halos after 300,000 years.
