An ISOCAM 6.75 micron image of the Helix Planetary Nebula
The above image inside a coordinate grid (viewgraph)

This image was created from ISOCAM observations performed as part of the ;

This image is dicussed in the item "A famous planetary nebula is cleaner than expected" that appeared in the ESA/ISO Info Note 25.97. Other images from this note can be viewed here

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