星せい学がくせいがくMeanings1nounastronomyobsolete termObsolete term; replaced by 天文学 in modern Japanese. Found in historical or literary contexts.See also: 天文学江え戸ど時じ代だいには、星せい学がくは主おもに暦こよみ作づくりのために研けん究きゅうされた。In the Edo period, astronomy was studied mainly for calendar-making.