image credit: Hubble Heritage Team, J. Biretta (STScI) et al., (STScI/AURA), ESA, NASA; image source; larger image
This is the Boomerang Nebula--gas and dust expelled from an aging star--captured in polarized light. To learn more about this image, visit Astronomy Picture of the Day: Boomerang Nebula.
Physics 2000: Polarization
To learn more about polarized light, visit Physics 2000: Polarization. For more images showing polarization effects, see the Hyperphysics page Polarization and Interference Colors.