Extragalactic nebula
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A large nebula located outside the Milky Way galaxy and acting as an independent island universe. It is a large group of stars and interstellar matter, with a diameter of several thousand to tens of thousands of light years. Depending on the shape, they are classified as elliptical nebulae, spiral nebulae, barred spiral nebulae, irregular nebulae, etc. The Andromeda Galaxy is the most famous. Source: The Selected Edition of the Japanese Language Dictionary About the Selected Edition of the Japanese Language Dictionary Information |
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〘名〙 銀河系の外側にあり、独立した島宇宙となっている大星雲。恒星と星間物質の大集団で、直径数千ないし十数万光年におよぶ。形状により、楕円星雲、渦巻き星雲、棒渦巻き星雲、不規則星雲などに分類される。アンドロメダ大星雲は最も有名。
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