  The full compressible Navier-Stokes system describing the motion of a
viscous, compressible, heat-conductive, and Newtonian polytropic fluid is
studied in a three-dimensional simply connected bounded domain with smooth
boundary having a finite number of two-dimensional connected components. For
the initial-boundary-value problem with slip boundary conditions on the
velocity and Neumann boundary one on the temperature, the global existence of
classical and weak solutions which are of small energy but possibly large
oscillations is established. In particular, both the density and temperature
are allowed to vanish initially. Finally, the exponential stability of the
density, velocity, and temperature is also obtained. Moreover, it is shown that
for the classical solutions, the oscillation of the density will grow
unboundedly in the long run with an exponential rate provided vacuum appears
(even at a point) initially. This is the first result concerning the global
existence of classical solutions to the full compressible Navier-Stokes
equations with vacuum in general three-dimensional bounded smooth domains.
