http://apod.nasa.gov/apod/ap130307.html
This is a picture of the famous cosmic cloud "Thor's Helmet". I can see why it is called such, as it does look like a helmet with some kind of wings on the side that poke out of the top. This cloud is an outstanding 30 light years across. It was formed from the massive winds of the star in this nebula's core. The star is thought to be in a pre-super nova stage. This nebula is 15,000 light years away from Canis Major. This nebula is a bluish-green because of the mass presence of oxygen.
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