Abstract
Magnetic fields and wind asymmetries from rotating stars, along with precession of the stellar rotation axis, can create most of the observed Planetary Nebulae morphologies and collimated outflows (jets). The collimation of the flows by magnetic tension becomes very efficient after the magnetized wind has passed through the reverse shock of the PN. Also, the concentric rings observed in some PNe can be explained by a solar-like magnetic cycle with periodic polarity inversions.
