Pictures of Thor's Helmet Nebula - BBC Sky at Night Magazine
NGC 2359 - Wikipedia
File:NGC 2359, Thor's Helmet (core).jpg - Wikipedia
AstroBackyard - Here is my latest photo of "Thor's Helmet", a spectacular nebula in Canis Major. You can watch me photograph this deep-sky object in today's video: https://youtu.be/d9rj2PtPdm0 I hope to see
Thor's Helmet Nebula shot for 29hrs under dark skies (OC) : r/Astronomy