Thors Helmet: This impressive nebula formed somewhat like a Viking helmet in the constellation of Canis Major is created by the bright star in the center of the image, which is a so called Wolf-Rayet star. These are very massive and extremely hot stars in a late phase of their life cycle, that eject tremendous amounts of matter and radiation, which then strike interstellar matter and previously ejected material from the star and make it shine.
The distance of the nebula is about 15000 LY.

The image was taken at the IAS astronomical site at the Hakos farm in Namibia.

Object Thorīs Helmet
Category IAS Hakos, Namibia
Designation NGC 2359
Constellation Canis Major
Optics Keller 20 inch Cassegrain f/9 in corrected secondary focus
Mount Liebscher GEM
Camera SBIG STL-11000M with internal CFW 5
Exposure 5 x 10min each Astrodon RGB filterset. Maxim DL for image acquisition
Calibration Dark Frame
Guiding Selfguiding
Processing Maxim DL5, Photoshop. Color Code: Synthetic L,R,G,B
Location-Date IAS-Hakos, Namibia - 17+18 Apr 2010
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