  In this review, analytical results obtained for a wide class of stationary
axisymmetric flows in the vicinity of compact astrophysical objects are
analyzed, with an emphasis on quantitative predictions for specific sources.
Recent years have witnessed a great increase in understanding the formation and
properties of astrophysical jets. This is due not only to new observations but
also to advances in analytical theory which has produced fairly simple
relations, and to what can undoubtedly be called a breakthrough in numerical
simulation which has enabled confirmation of theoretical predictions. Of
course, we are still very far from fully understanding the physical processes
occurring in compact sources. Nevertheless, the progress made raises hopes for
near-future test observations that can give insight into the physical processes
occurring in active astrophysical objects.
