天文てんもん
temmon

Noun

1. astronomy

かれ天文てんもんがく、即すなわ天文てんもん学問がくもん偉大いだい権威けんいであった。
karewa temmongaku sunawachi temmonno gakumonno idaina ken'ideatta.
He was a great authority on astronomy, or the science of the heavenly bodies.