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Keyword: greatoverdog

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  • NGC 2359: Thor's Helmet (Astronomy Picture of the Day)

    06/12/2020 6:21:08 PM PDT · by MtnClimber · 26 replies
    APOD.NASA ^ | 2020 June 12 | NASA/Martin Pugh
    Explanation: NGC 2359 is a helmet-shaped cosmic cloud with wing-like appendages popularly called Thor's Helmet. Heroically sized even for a Norse god, Thor's Helmet is about 30 light-years across. In fact, the helmet is more like an interstellar bubble, blown as a fast wind from the bright, massive star near the bubble's center inflates a region within the surrounding molecular cloud. Known as a Wolf-Rayet star, the central star is an extremely hot giant thought to be in a brief, pre-supernova stage of evolution. NGC 2359 is located about 15,000 light-years away in the constellation of the Great Overdog. The...