noun
Lagoon Nebula
Proper noun referring to the Lagoon Nebula (M8), a large emission nebula in the constellation Sagittarius.
干潟星雲はいて座にある散光星雲です。
The Lagoon Nebula is a diffuse nebula in the constellation Sagittarius.
Compound of 干潟 (ひがた, 'tidal flat') and 星雲 (せいうん, 'nebula'), named for its lagoon-like shape.