  This paper is concerned with the large-time behavior of solutions to the
initial and initial boundary value problems with large initial data for the
compressible Navier-Stokes system describing the one-dimensional motion of a
viscous heat-conducting perfect polytropic gas in unbounded domains. The
temperature is proved to be bounded from below and above independently of both
time and space. Moreover, the global solution is showed to be asymptotically
stable as time tends to infinity. Note that the initial data can be arbitrarily
large. This result is proved by using elementary energy methods.
