Rahu is one of the two lunar nodes (chaya grahas — shadow planets) in Vedic astrology. It is not a physical body but a mathematical point — the north node of the Moon, where the Moon's orbit crosses the ecliptic. In Vedic mythology, Rahu is the severed head of the demon Svarbhanu, who tricked the gods into giving him nectar (amrita) of immortality.
Rahu is famous for causing solar and lunar eclipses (Grahan). Astronomically, a solar eclipse occurs when the Moon (Rahu/Ketu axis) blocks the Sun — this is why Rahu is said to "swallow" the Sun and Moon.
Rahu amplifies whatever house and planet it is associated with — often to the point of obsession. It is strongly connected to foreign elements: foreign countries, foreign cultures, unconventional paths, and breaking social norms. In the modern world, Rahu has special affinity with technology, media, and mass influence.
The Rahu Mahadasha lasts 18 years and is famous for its intensely unpredictable nature. The first few years can be chaotic and disorienting — old structures breaking down, sudden upheavals. But Rahu can also bring explosive material success, fame (especially unconventional or sudden fame), and major foreign connections. The results depend enormously on Rahu's placement, the sign it occupies, and its lord.
These upayas are based on classical Vedic and Lal Kitab traditions. Consult a qualified Jyotishi before wearing gemstones or undertaking major rituals.
Feed stray dogs and cows regularly
Keep a coconut or whole barley at home
Chant the Durga Sapthashati or Rahu Beej Mantra
Wear Hessonite (Gomed) only after consultation
Donate blue or black items on Saturdays
Seek blessings from elderly women and grandmothers