九曜（梵语：नवग्रह，泰米尔语：கோண்மீன்）古印度占星术中的九个天体的统称。九曜的概念在唐朝时传入中国，后遍及东亚，对东亚地区的各种占星术产生重大影响。

九曜的名字分别以印度神话中的神灵命名。

Graha (Sanskrit gráha "seizing, laying hold of, holding", Tamil: kōḷ) or Navagraha (Sanskrit: नवग्रह, lit. nine planets) are astrological figures in Hindu astrology. There are nine, the Navagraha (Tamily kōṇmīṉ, "imperial stars"), which includes the planets Mars, Mercury, Jupiter, Venus, and Saturn; the Sun; the Moon; and positions in the sky, Rahu (north or ascending lunar node) and Ketu (south or descending lunar node).