  The Spitzer Space Telescope, NASA's Great Observatory for infrared astronomy,
has made available new tools for the investigation of the infrared properties
of planetary nebulae. The three instruments onboard, including the Infrared
Array Camera (IRAC), the Multiband Imaging Photometer for Spitzer (MIPS), and
the Infrared Spectrograph (IRS), provide imaging capability from 3.6 to 160
microns, and low and moderate resolution spectroscopy from 5.2 to 38 microns.
In this paper I review recent Spitzer results concerning planetary nebulae and
their asymmetrical structures.
