ちょう だい質量 しつりょうブラックホールだったら
chōdaishitsuryōburakkuhōrudattara

Noun
Da Copula

The "-tara" conditional form ("if/when…") of 超大質量ブラックホール

1. If it were a supermassive black hole; If it's a supermassive black hole

Tara Conditional
Astronomy