Thor’s Helmet (NGC 2359) — perhaps the most impressive name for any deep-sky object — formed when radiation from a luminous star sculpted a cosmic bubble.
Warren A. Keller
In the January 2010 issue of Astronomy magazine, I suggested 40 celestial objects (plus 10 double stars) that make great targets for winter nights. Twelve images accompanied the story. We couldn’t fit images of all the objects in the magazine, so we created this page so I could share 20 more of them with you.
