Thor’s Helmet (NGC 2359) is an emission nebula in the constellation Canis Major. The nebula is similar to the helmet of the Norse god of thunder and lightning, Thor.
Thor’s helmet lies about 11.96 light years from Earth.
The central star nebula is the Wolf-Rayet star WR7. It is an extremely hot star. Thor’s Helmet is similar in nature to the Bubble Nebula (NGC 7635), with a more complex shape and curved helmet-shaped structure. The nebula has the overall shape of a bubble, but with complex fibrous structures.