PIA03294: The Infrared Helix
 Target Name:  Helix Nebula
 Mission:  Spitzer Space Telescope
 Instrument:  IRAC
 Product Size:  2400 x 2794 pixels (w x h)
 Produced By:  California Institute of Technology 
 Full-Res TIFF:  PIA03294.tif (20.14 MB)
 Full-Res JPEG:  PIA03294.jpg (1.082 MB)

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Original Caption Released with Image:

The Helix nebula exhibits complex structure on the smallest visible scales. It is composed of gaseous shells and disks puffed out by a dying sun-like star.

In this new [sic] image from NASA's Spitzer Space Telescope, "cometary knots" show blue-green heads caused by excitation of their molecular material from shocks or ultraviolet radiation. The tails of the cometary knots appear redder due to being shielded from the central star's ultraviolet radiation and wind by the heads of the knots.

This image was captured by the telescope's infrared array camera. The false color composite depicts wavelengths of 3.6 microns (blue), 4.5 microns (green), and 8.0 microns (red). The color saturation has been increased to intensify hues.

Image Credit:
NASA / JPL-Caltech /Harvard-Smithsonian CfA

Image Addition Date: