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はくちょう座 超新星残骸網状星雲 (NGC 6992 〜 6995.6960)

Great Orion Nebula (M42 / NGC 1976)

Andromeda Galaxy (M31)

Andromeda Galaxy (M31)

はくちょう座超新星残骸網状星雲 (NGC 6992 〜 6995.6960)