H II regions
plural of dryandra
plural of H II region
(zoology) Any fish of the superorder Acanthopterygii.
An island in Friesland, Netherlands. / A municipality of Friesland, Netherlands.
電離水素領域は銀河の渦巻腕によく見られ、新しい星が形成される場所で明るく輝きます。
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