  Redshift-space distortions are generally considered in the plane parallel
limit, where the angular separation between the two sources can be neglected.
Given that galaxy catalogues now cover large fractions of the sky, it becomes
necessary to consider them in a formalism which takes into account the wide
angle separations. In this article we derive an operational formula for the
matter correlators in the Newtonian limit to be used in actual data sets, both
in configuration and in Fourier spaces without relying on a plane-parallel
approximation. We then recover the plane-parallel limit not only in
configuration space where the geometry is simpler, but also in Fourier space,
and we exhibit the first corrections that should be included in large surveys
as a perturbative expansion over the plane-parallel results. We finally compare
our results to existing literature, and show explicitly how they are related.
