罗睺是印度神话中的阿修罗之一，是达耶提耶王毗婆罗吉提（Vipracitti）与辛悉迦（Simhika，达刹之女）的儿子。罗睺经常吞食日月，造成日蚀和月蚀。法华经序中列有四大阿修罗王婆稚、佉罗骞驮、毗摩质多罗、罗睺之名。

传说中提婆与阿修罗搅乳海求不死仙露。仙人战胜阿修罗后独占仙露。但是阿修罗之一的罗睺却变成天神的模样，混在其中喝了一口甘露，被日神和月神发现了，告诉给毗湿奴。仙露尚未经过罗睺的喉咙，他的头便被毗湿奴的化身摩酰尼砍下。但是罗睺的头因仙露而长生不老。为了报仇，他吞食日神和月神，造成日蚀和月蚀；当日月在他敞开的喉头走出，蚀便完结。

In Hindu tradition, Rahu () is the severed head of an asura called Svarbhānu, that swallows the sun causing eclipses. He is depicted in art as a serpent with no body riding a chariot drawn by eight black horses. Rahu is one of the navagraha (nine planets) in Vedic astrology and is paired with Ketu. The time of day considered to be under the influence of Rahu is called Rahu kala and is considered inauspicious. In Vedic astronomy, Rahu is considered to be a rogue planet. The other name of Rahu is Bhayanaka.