  We study the bending of jets in binary stellar systems. A compact companion
accretes mass from the slow wind of the mass-losing primary star, forms an
accretion disk, and blows two opposite jets. These fast jets are bent by the
slow wind. Disregarding the orbital motion, we find the dependence of the
bending angle on the properties of the slow wind and the jets. Bending of jets
is observed in planetary nebulae which are thought to be the descendants of
interacting binary stars. For example, in some of these planetary nebulae the
two bubbles (lobes) which are inflated by the two opposite jets, are displaced
to the same side of the symmetry axis of the nebula. Similar displacements are
observed in bubble pairs in the center of some clusters and groups of galaxies.
We compare the bending of jets in binary stellar systems with that in clusters
of galaxies.
