This is an image of NGC 2359, better known as the Thor's Helmet nebula, obtained using the Wide-Field Camera on the Isaac Newton Telescope.
NGC 2359 is actually more like an interstellar bubble, blown as a fast wind from the bright, massive star near the bubble's center sweeps through a
surrounding molecular cloud. The central star is an extremely hot giant Wolf-Rayet star thought to be in a brief,
pre-supernova stage of evolution.