The part of the galaxy where the concentration of neutral hydrogen is particularly high. This was discovered through the development of radio astronomy. It is found in large amounts in the arms of the galaxy. Source : Heibonsha Encyclopedia About MyPedia Information |
銀河の中を埋め尽くしている中性水素の濃度が特に高い部分。電波天文学の発達により明らかにされたもの。銀河系の腕の部分に多く存在する。
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