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NGC 2359 (Thor's Helmet Nebula)


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NGC 2359
Thor's Helmet Nebula (トールのかぶと星雲)

Emission Nebula (散光星雲)
Nb EN

別名 (Other names)

LBN 1041, Sh2-298, RCW 5, GUM 4, Sharpless 298, Sh 2-298

星座 (Constellation)
おおいぬ座 (CMa) (Canis Major)

距離 (Distance)
15,000光年 (15,000 light-years)

NGC 2359は、おおいぬ座に位置する散光星雲。
ウォルフ・ライエ星と知られている中心星HD 56925(WR7)は、短期間で超新星となる前の段階であると考えられている極端に高温の巨星です。
この星雲の性質はNGC 7635に似ており、近くの大きな分子雲との相互作用は、より複雑な形状や湾曲した Thor's Helmet と呼ばれている構造を作っていると考えられている。

Thor's Helmet Nebula (NGC 2359) is an emission nebula located 15,000 light years from the Earth in the constellation Canis Major.

NGC 2359 (Thor's Helmet Nebula) : Picture

Thor's Helmet
Thor's Helmet
(C) NASA

Thor's Helmet
Thor's Helmet
(C) NASA
This helmet-shaped cosmic cloud with wing-like appendages is 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 actually more like an interstellar bubble, blown as a fast wind from the bright, massive star near the bubble's center sweeps through a 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. Cataloged as NGC 2359, the nebula is located about 15,000 light-years away in the constellation Canis Major. The sharp image, made using broadband and narrowband filters, captures striking details of the nebula's filamentary structures. It shows off a blue-green color from strong emission due to oxygen atoms in the glowing gas.

NGC2359 (Thor's Helmet Nebula)
NGC 2359 (Thor's Helmet Nebula)
(C) NASA

NGC2359 (Thor's Helmet Nebula)
NGC 2359 (Thor's Helmet Nebula)
(C) NASA

IC2177 (Seagull Nebula)
IC 2177 (Seagull Nebula/Left)
NGC 2359 (Thor's Helmet Nebula/Right)
(C) NASA

NGC2359 (Thor's Helmet Nebula) NGC2359 (Thor's Helmet Nebula)
NGC 2359 (Thor's Helmet Nebula)
(C) NASA
NGC 2359 (Thor's Helmet Nebula)
(C) NASA
NGC2359 (Thor's Helmet Nebula) NGC2359 (Thor's Helmet Nebula)
NGC 2359 (Thor's Helmet Nebula)
(C) NASA
NGC 2359 (Thor's Helmet Nebula)
(C) NASA
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NGC 2359 (Thor's Helmet Nebula) : Movie

Zooming in on Thor's Helmet

Panning across the Thor's Helmet Nebula
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「ウィキペディア(wikipedia):フリー百科事典」より文章引用。
NGC 2359. (2012, October 27). In Wikipedia.
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