NGC2359
About this celestial object
NGC 2359, Thor’s Helmet, glows as a storm‑shaped gas bubble in Canis Major.
This emission nebula is inflated by the winds of a hot Wolf‑Rayet star; its arcing “wings” make it unmistakable.
An hour of exposure at 250 mm brings out the faint glow despite dense air near the ground.
The F/5 setup uses the wide field to include the nebula’s surroundings atmospherically.
Image and observation
Catalogue: NGC 2359
Capture date: 2025-03-09
Total exposure: 3560 s
Imaging and processing: Ulrich Schwarz · Vespera Pro