銀河 ぎんが系外 けいがい星雲 せいうんではありませんでした
gingakeiga iseiundewārimasendeshita

Noun
Desu Copula

The polite, past negative form of 銀河系外星雲

1. Was not a galactic nebula.; Was not an extragalactic nebula.

Past/Perfective
Negative
Polite
Formal Register
Astronomy