What does 天文 mean?
天文 is a Japanese noun meaning “astronomy” in English. It is written as 天文 in kanji, てんもん in hiragana, and tenmon in romaji. This word is part of JLPT N3 vocabulary.
Example sentence
彼は天文学、即ち天文の学問の偉大な権威であった。
He was a great authority on astronomy, or the science of the heavenly bodies.