Explanation: NGC 2359 is a striking emission nebula with an impressive popular name - Thor's Helmet Sure  its suggestive winged appearance might lead some to refer to it as the "duck nebula"  but if you were a nebula which name would you choose? By any name NGC 2359 is a bubble-like nebula some 30 light-years across  blown by energetic winds from an extremely hot star seen near the center and classified as a Wolf-Rayet star