  The scalar mode temperature fluctuations of the cosmic microwave background
has been derived in a spatially closed universe from two different methods.
First, by following the photon trajectory after the last scattering and then
from the Boltzmann equation in a closed background and the line of sight
integral method. An analytic expression for the temperature multipole
coefficient has been extracted at the hydrodynamical limit, where we have
considered some tolerable approximations. By considering a realistic set of
cosmological parameters taken from a fit to data from Planck, the TT power
spectrum in the scalar mode for the closed universe has been compared with
numerical one by using the CAMB code and also latest observational data. The
analytic result agrees with the numerical one on almost all scales. The peak
positions are in very good agreement with numerical result while the peak
heights agree with that to within 10% due to the approximations have been
considered for this derivation.
