- It is not clear when the ancient Japanese became deeply interested in the stars. In the Nihonshoki, there is a description that "In the 12th year of Emperor Jomei (640 AD), the star enters the moon on the 7th day of the second month". It is said that this "the star entering the moon" is called a star eclipse, in which a star (fixed star or planet) is hidden by the moon.
- Picture shows the Uranus(small star on the lower left of the moon) about to hide behind the moon.
星を詠んだ歌 Poems on stars
- Except for Tanabata's "Hikoboshi(Altair)", there are very few poems on stars. "Akaboshi", which indicates the morning star, and "Yufuzutsu," which indicates the evening star, are written in Yamanoue-no-Okura's long poem. "Yufuzutsu" is also included in the elegy of Princess Asuka, composed by Kakimoto-no-Hitomaro.