  We consider the compressible Navier - Stokes - Fourier - Poisson system
describing the motion of a viscous heat conducting rotating fluid confined to a
straight layer $ \Omega_{\epsilon} = \omega \times (0,\epsilon) $, where
$\omega$ is a 2-D domain. The aim of this paper is to show that the weak
solutions in the 3D domain converge to the strong solution of the 2-D Navier -
Stokes - Fourier - Poisson system $\omega$ as $\epsilon \to 0$ on the time
interval, where the strong solution exists. We consider two different regimes
in dependence on the asymptotic behaviour of the Froude number.
