あんこくせいうん
暗黒星雲
1. dark nebulaAstronomy
2. Dark nebulaA dark nebula is a type of interstellar cloud that is so dense that it obscures the light from the background emission or reflection nebula or that it blocks out background stars. The extinction of the light is caused by interstellar dust grains located in the coldest, densest parts of larger molecular clouds. Clusters and large complexes of dark nebulae are associated with Giant Molecular Clouds. Isolated small dark nebulae are called Bok globules.
Read “Dark nebula” on English Wikipedia
Read “暗黒星雲” on Japanese Wikipedia
Read “Dark nebula” on DBpedia
Read “Dark nebula” on English Wikipedia
Read “暗黒星雲” on Japanese Wikipedia
Read “Dark nebula” on DBpedia
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