Trifid Nebula

Japanese: 三裂星雲 - さんれつせいうん(英語表記)Trifid Nebula
Trifid Nebula

A diffuse nebula in the constellation Sagittarius. It is so named because of the black bands that split the large nebula, which is 30 arcminutes in size, into three parts. The nebula is about 1000 parsecs away and spans 10 parsecs. A star was born in the center of a large gas cloud, and the gas that did not become a star glows due to the ultraviolet rays of that star. The cold, dense parts of the gas become dark nebulae, creating the three black bands.

[Shuzo Isobe May 19, 2015]

[Reference item] | Sagittarius | Diffuse Nebula
Trifid Nebula
A diffuse nebula in Sagittarius. NGC6514 (M20). A black band (dark nebula) splits the nebula into three parts. Photographed with the Murikabushi Telescope at Ishigakijima Astronomical Observatory © National Astronomical Observatory of Japan ">

Trifid Nebula

Sagittarius
©Akira Fujii ">

Sagittarius


Source: Shogakukan Encyclopedia Nipponica About Encyclopedia Nipponica Information | Legend

Japanese:

いて座にある散光星雲。30分角にも及ぶ大きな星雲を三つに裂くように黒い帯が走っているので、この名でよばれる。この星雲は約1000パーセクの距離にあり、10パーセクの広がりをもつ。大きなガス雲から中心にある星が誕生し、その星の紫外線によって星にならなかったガスが輝いている。またガスが低温、かつ濃い部分が暗黒星雲となり、3本の黒い帯をつくっているのである。

[磯部琇三 2015年5月19日]

[参照項目] | いて座 | 散光星雲
三裂星雲
いて座にある散光星雲。NGC6514(M20)。星雲を三つに裂くように黒い帯(暗黒星雲)が走る。石垣島天文台むりかぶし望遠鏡により撮影©国立天文台">

三裂星雲

いて座
©藤井 旭">

いて座


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