銀河 ぎんが系内 けいない星雲 せいうんなら
gingakei nai seiunnara

Noun
Da Copula

The "-nara" conditional form ("if/when…") of 銀河系内星雲

1. If it is a nebula within the Milky Way…; When it is a nebula within the Milky Way…

Nara Conditional
Astronomy