Translation of "Siirius" into English

Kui ta oleks teadnud, et Siirius on Päikesest üksjagu eredam, oleks ta õige vastuse kätte leidnud.

If he had known that Sirius was intrinsically brighter than the sun he would've gotten the answer exactly right.

Ta küsis endalt, milline auk näib sama ere, kui eelmisel ööl vaadeldud täht Siirius.

He asked himself, which hole seemed as bright as he remembered the star Sirius to have been the previous evening.