thedailywhat:

Astronomy Picture of the Day: NGC 2359, popularly known as “Thor’s Helmet,” is a cosmic cloud (or “emission nebula”) approximately 30 light years wide which surrounds a Wolf-Rayet star — “an extremely hot giant thought to be in a brief, pre-supernova stage of evolution” — in the Canis Major constellation.

Also: Most expensive movie teaser ever.

[apod.]