我国古代人民为了认识星辰和观测天象,把天上的恒星几个一组,每组合定一个名称,这样的恒星组合称为星官。各个星官所包含的星数多寡不等,少到一个,多到几十个,所占的天区范围也各不相同。其星官数目,在先秦的典籍中记载有约38个星官。《史记·天官书》中记载91个。《汉书·天文志》中记载说:“经星常宿中外官凡一百一十八名,积数七百八十三星。” In ancient times, our ancient people named a group of stars in the sky and a name for each group in order to know the stars and observe the sky. Such a combination of stars is called a “star officer.” Each star contains the number of stars ranging from less than one to more than a few dozen, the area occupied by the area varies. The number of its star officer, in the pre-Qin classics recorded about 38 star officer. “Shi Ji Tian Guan Shu” records 91. “Han astronomical records” recorded in the record: “by the stars of all places where foreign officials who are 118, the total number of 783 stars.”