かんじょうせいうん
環状星雲
1. Ring NebulaAstronomy
2. Ring NebulaThe famous Ring Nebula (also catalogued as Messier 57, M57 or NGC 6720) appears in the northern constellation of Lyra. It is a prominent example of a planetary nebula. This is a shell of ionized gas expelled into the surrounding interstellar medium by a red giant star, which was passing through the last stage in its evolution before becoming a white dwarf.
Read “Ring Nebula” on English Wikipedia
Read “環状星雲” on Japanese Wikipedia
Read “Ring Nebula” on DBpedia
Read “Ring Nebula” on English Wikipedia
Read “環状星雲” on Japanese Wikipedia
Read “Ring Nebula” on DBpedia
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