Celestial hemisphere:  Southern  ·  Constellation: Canis Major (CMa)  ·  Contains:  IC 468  ·  LBN 1040  ·  LBN 1041  ·  NGC 2359  ·  Sh2-298
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NGC 2359 - Thor's Helmet, Kirby Collins
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NGC 2359 - Thor's Helmet

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NGC 2359 - Thor's Helmet, Kirby Collins
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NGC 2359 - Thor's Helmet

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Description

NGC 2359 is an emission nebula in the constellation Canis Major.  Like the Bubble Nebula, it is formed when material ejected from a hot central star impacts surrounding gases, forming a bubble-like structure.  NGC 2359, however, contains large amounts of ionized oxygen, which give it a distinct blue color.  With wing-like streamers above the central shell, it has informally been called the "Duck Nebula" or more recently "Thor's Helmet" (after the Marvel comic book hero).

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NGC 2359 - Thor's Helmet, Kirby Collins