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NGC 55 (Irregular Galaxy)


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NGC 55
Irregular Galaxy (不規則銀河)
Gx SBm


別名 (Other names)
PGC 1014, ESO 293-50, MCG -7-1-13, Caldwell 72

明るさ (Brightness)
7.8等級

星座 (Constellation)
ちょうこくしつ座 (Scl) (Sculptor)


距離 (Distance)
600万光年 (6 million light-years)

NGC 55(Caldwell 72)は、ちょうこくしつ座に位置する銀河。

日本国内で見える銀河としてはアンドロメダ銀河、さんかく座銀河に次いで明るいが、東京での南中高度15°ほどと南に低いことから目立たない存在となっている。

NGC 55 is an irregular galaxy located 6 million light years from the Earth in the constellation Sculptor.

NGC 55 (Irregular Galaxy) : Picture

Irregular Galaxy NGC 55
Irregular Galaxy NGC 55
(C) NASA
Irregular galaxy NGC 55 is thought to be similar to the Large Magellanic Cloud (LMC). But while the LMC is about 180,000 light-years away and is a well known satellite of our own Milky Way Galaxy, NGC 55 is more like 6 million light-years distant and is a member of the Sculptor Galaxy Group. Classified as an irregular galaxy, in deep exposures the LMC itself resembles a barred disk galaxy. However, spanning about 50,000 light-years, NGC 55 is seen nearly edge-on, presenting a flattened, narrow profile in contrast with our face-on view of the LMC. Just as large star forming regions create emission nebulae in the LMC, NGC 55 is also seen to be producing new stars. This gorgeous galaxy portrait highlights a bright core, telltale pinkish emission regions, and young blue star clusters in NGC 55.

NGC 55
NGC 55
(C) NASA
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NGC 55 (Irregular Galaxy) : Movie

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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 55. (2012, October 27). In Wikipedia.
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