NGC 2359 Thor’s Helmet

Thor’s Helmet is an interstellar bubble,blown as a fast wind from its bright central star sweeps through a surrounding molecular cloud. The central star is a Wolf-Rayet star: an extremely massive giant in a brief, pre-supernova stage of evolution. These stars are very rare, incredibly hot (25000-50000K) and expel their outer layers at velocities up to thousands of km/sec

These images were taken on the nights of 15 & 16 January 2015.

The Ha is 24 x 900s, OIII 5 x 900s binned 2x2 and SII just 2 x 900s binned 2x2.


They were taken with a Megrez 90 and Atik 460EX camera with Astrodon filters.

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Ha version

Hubble palette version : SII->R, Ha->G, OIII->B