|NGC 2359, "Thor's Helmet", in Canis Major. North is to the left in this image.|
The complex shape of NGC 2359 may be the result of interactions between the central star's stellar wind and a nearby molecular cloud, a region of greater-than-average gas and dust density. It's a rather faint nebula, so I'm glad I was able to get as much of it as I did (and it still required some pretty good histogram stretching to be this bright). The colors, though, are roughly correct, as I used wide-band filters instead of narrow-band ones.