在西方占星学里，根据一个人在地球上的确切的出生时间和出生地点，用图表和符号纪录星体在黄道十二宫的位置的图，英文是 Natal chart / Birth chart，出生图 。 有人称为 天宫图。 占星师用来获得相关个人的信息﹑甚至预测。近代的「出生图」多是圆形的。早期也有方形的。

中文译名方命，「出生图」是意思上的直接翻译。但在中国占星学里，尢其是紫微斗数，也有分为十二格而且功能作用相同的图则称为命盘。(只是，中国的命盘传统上是方形的。随着现代绘图工具多是电脑程序，中国占星学紫微斗数书本，近年也有圆形的命盘 。)

In astrology, a natal chart is a stylized map of the universe with the "native" (the individual or subject or anything Created or Built to be studied) at the center. It is calculated for the exact time and location of the native's birth for the purposes of gaining insight into the native's personality and potential. Commonly used alternative names for the natal chart include birth chart, horoscope, natus, nativity, radix, geniture and genethliac chart, among others. The chart shows the positions of the sun, moon, planets, and potentially other celestial objects, all referred to as the native's "planets," within the frames of references defined by the astrological signs and houses.