Emptiness constellation
One of the 28 traditional Chinese lunar mansions. Used in historical and astronomical contexts; not part of everyday vocabulary.
See also: 虚 (きょ)
The Emptiness constellation is one of the 28 mansions and corresponds to an autumn constellation.
Standard kanji form for this constellation name.
Alternate spelling using 星 for 'star', likely more transparent for learners.
From Chinese astronomy, the name 虚宿 (Emptiness mansion) is a direct borrowing of the Chinese term. The reading とみてぼし is a Japanese kun'yomi adaptation of the kanji.