The Navagraha framework
Navagraha (literally 'nine seizers') is the Vedic astrology system of nine cosmic forces that 'seize' our attention and shape our experience. Seven are the visible celestial bodies — Sun, Moon, Mars, Mercury, Jupiter, Venus, Saturn — each corresponding to a day of the week. Two are mathematical points — Rahu and Ketu, the lunar nodes where the Moon's orbit crosses the ecliptic. These nine together explain virtually every event a Vedic astrologer interprets.
Each graha has a body of attributes: physical significations (organs, body parts), psychological significations (qualities of mind), worldly significations (career, relationships, possessions), elemental nature, gender, caste, mythology, deity, friend/enemy/neutral planets, exaltation/debilitation signs, and their own beej and stotra mantras. Vedic astrology is, at its core, the study of how these nine forces interact in your specific chart.
The 9 grahas are NOT identical with the 9 planets of modern astronomy — Vedic astrology doesn't include Uranus, Neptune, Pluto (though some modern Vedic astrologers experiment with them), and DOES include the lunar nodes (Rahu and Ketu) which Western astronomy treats as just geometric points. The Vedic system is roughly 5,000 years old and was designed for predictive use, not modern physics. Both systems work — they just work for different purposes.
Below is a complete reference to all nine, organized by their natural groupings.
The Two Lights — Sun and Moon
Sun (Surya, Ravi): The Atmakaraka (soul significator). Rules ego, vitality, leadership, father, government, authority, bones, heart, eyes (especially right). Hot, dry, masculine, kshatriya (warrior caste), ruler of the day Sunday. Friends with Moon, Mars, Jupiter; enemy of Venus and Saturn; neutral with Mercury. Exalted in Aries, debilitated in Libra. Owns Leo. Beej mantra: 'Om Hraam Hreem Hraum Sah Suryaya Namah'. Gemstone: Ruby. Day: Sunday. Direction: East.
Moon (Chandra, Soma): The Manakaraka (mind significator). Rules emotions, mother, comfort, public, water, lungs, breasts, fluids of body. Cool, moist, feminine, vaishya (merchant caste), ruler of Monday. Friends with Sun, Mercury; neutral with Mars, Jupiter, Saturn, Venus; no enemies (though Rahu/Ketu eclipse him). Exalted in Taurus, debilitated in Scorpio. Owns Cancer. Beej mantra: 'Om Shraam Shreem Shraum Sah Chandraya Namah'. Gemstone: Pearl. Day: Monday. Direction: Northwest.
These two are called the 'lights' because they're the visible sources of solar and reflected light, and they together represent the masculine-feminine, soul-mind, day-night polarities of human experience. A chart with both lights well-placed has a healthy balance of ambition (Sun) and contentment (Moon). When either is afflicted, the other has to compensate — which is why so much Vedic remedial work focuses on either the Sun or the Moon.
The Personal Planets — Mars, Mercury, Jupiter, Venus
Mars (Mangal, Bhauma, Kuja): The warrior. Rules courage, anger, energy, action, brothers, real estate, blood, muscles, accidents, surgery. Hot, dry, masculine, kshatriya, ruler of Tuesday. Friends with Sun, Moon, Jupiter; enemy of Mercury; neutral with Venus, Saturn. Exalted in Capricorn, debilitated in Cancer. Owns Aries and Scorpio. Beej mantra: 'Om Kraam Kreem Kraum Sah Bhaumaya Namah'. Gemstone: Red Coral. Day: Tuesday. Direction: South.
Mercury (Budha): The communicator. Rules intelligence, speech, commerce, learning, writing, nervous system, skin. Mixed nature, can take on the qualities of any planet he conjuncts. Vaishya, ruler of Wednesday. Friends with Sun, Venus; enemy of Moon; neutral with Mars, Jupiter, Saturn. Exalted in Virgo, debilitated in Pisces. Owns Gemini and Virgo. Beej mantra: 'Om Bram Breem Braum Sah Budhaya Namah'. Gemstone: Emerald. Day: Wednesday. Direction: North.
Jupiter (Brihaspati, Guru): The teacher and the great benefic. Rules wisdom, knowledge, religion, husband (in female charts), children (especially first), ethics, expansion, liver, fat. Warm, moist, masculine, brahmin (priest caste), ruler of Thursday. Friends with Sun, Moon, Mars; enemy of Mercury, Venus; neutral with Saturn. Exalted in Cancer, debilitated in Capricorn. Owns Sagittarius and Pisces. Beej mantra: 'Om Graam Greem Graum Sah Gurave Namah'. Gemstone: Yellow Sapphire. Day: Thursday. Direction: Northeast.
Venus (Shukra): The lover and the lesser benefic. Rules love, marriage, beauty, art, music, luxury, wife (in male charts), reproductive system, vehicles. Cool, moist, feminine, brahmin, ruler of Friday. Friends with Mercury, Saturn; enemy of Sun, Moon; neutral with Mars, Jupiter. Exalted in Pisces, debilitated in Virgo. Owns Taurus and Libra. Beej mantra: 'Om Draam Dreem Draum Sah Shukraya Namah'. Gemstone: Diamond. Day: Friday. Direction: Southeast.
The Outer / Karmic Planets — Saturn, Rahu, Ketu
Saturn (Shani): The karmic teacher. Rules discipline, longevity, structure, restriction, servants, the masses, time, bones, cold, decay. Cold, dry, neuter (some texts say male), shudra (servant caste), ruler of Saturday. Friends with Mercury, Venus; enemy of Sun, Moon, Mars; neutral with Jupiter. Exalted in Libra, debilitated in Aries. Owns Capricorn and Aquarius. Beej mantra: 'Om Pram Preem Praum Sah Shanaye Namah'. Gemstone: Blue Sapphire. Day: Saturday. Direction: West.
Rahu (North Node, Dragon's Head): The shadow planet of obsession and outward expansion. Mathematical point — no body, but tremendous effect. Rules unconventional ambitions, foreign things, technology, illusions, addictions, sudden gains and losses, eclipses (with the Moon). No own sign in classical Vedic; modern astrologers often associate him with Aquarius or Virgo. Exalted (per Parashara) in Taurus, debilitated in Scorpio (some traditions reverse this — schools differ). Beej mantra: 'Om Bhraam Bhreem Bhraum Sah Rahave Namah'. Gemstone: Hessonite (Gomed). Direction: Southwest.
Ketu (South Node, Dragon's Tail): The shadow planet of detachment and inner liberation. Mathematical point — Rahu's opposite. Rules spirituality, moksha, past-life karma, surgery, sudden separations, occult, computation, abstraction. No own sign in classical Vedic; modern astrologers often associate with Scorpio or Pisces. Exalted (per Parashara) in Scorpio, debilitated in Taurus. Beej mantra: 'Om Sraam Sreem Sraum Sah Ketave Namah'. Gemstone: Cat's Eye (Lehsunia). Direction: Northeast (some traditions say variable).
Rahu and Ketu always sit exactly 180° apart — they're two ends of the same axis (the lunar nodal line). Whatever house Rahu occupies, Ketu sits in the opposite house. This 'Rahu-Ketu axis' is one of the most important things to interpret in any Vedic chart, often more important than any single planet's placement.
How planets interact — friendships, aspects, combinations
Friendships: Each planet has friends, enemies and neutrals — five-fold relationships shown above. When two friends sit together or aspect each other, results are amplified positively. When two enemies do the same, the results are conflicted. Working astrologers use a more nuanced 'composite friendship' (Pancha Dha Maitri) which combines natural friendship with temporary friendship based on the actual chart positions — this changes the read significantly.
Aspects (Drishti): Every planet 'sees' some houses. All planets aspect the 7th from themselves. Mars additionally aspects 4th and 8th from himself. Jupiter additionally aspects 5th and 9th. Saturn additionally aspects 3rd and 10th. Rahu and Ketu aspect 5th, 7th and 9th from themselves (per Parashara). When a planet aspects a house, it influences events related to that house — even from across the chart.
Conjunctions: When two or more planets sit in the same sign and house, their energies blend. The blend can be powerful (e.g., Jupiter + Venus = Guru-Shukra Yoga, scholarly artist) or conflicted (e.g., Sun + Saturn = father-son tension within self). The closer they are by degree, the more intense the blend. Combustion (within Sun's degree threshold) is a special case where the planet's results weaken.
Yogas: When specific planetary combinations occur, they form named Yogas with predictable effects. Examples: Gajakesari (Moon-Jupiter angle) gives wisdom and prosperity; Chandra-Mangal (Moon-Mars in same house) gives wealth through enterprise; Neechabhanga Raja Yoga (cancellation of debilitation) turns weakness into strength; Kemadruma (Moon with no neighbour) creates emotional isolation. There are hundreds of Yogas — knowing the prominent ones in your chart is the bulk of personalized Vedic interpretation.
Quick reference card — at-a-glance summary
Sun • Day Sun • Ego, father, leadership • Exalted: Aries • Debilitated: Libra • Gem: Ruby • Mantra: Om Suryaya Namah
Moon • Day Mon • Mind, mother, comfort • Exalted: Taurus • Debilitated: Scorpio • Gem: Pearl • Mantra: Om Chandraya Namah
Mars • Day Tue • Energy, courage, brothers • Exalted: Capricorn • Debilitated: Cancer • Gem: Red Coral • Mantra: Om Bhaumaya Namah
Mercury • Day Wed • Intellect, speech, commerce • Exalted: Virgo • Debilitated: Pisces • Gem: Emerald • Mantra: Om Budhaya Namah
Jupiter • Day Thu • Wisdom, husband, children • Exalted: Cancer • Debilitated: Capricorn • Gem: Yellow Sapphire • Mantra: Om Gurave Namah
Venus • Day Fri • Love, marriage, art • Exalted: Pisces • Debilitated: Virgo • Gem: Diamond • Mantra: Om Shukraya Namah
Saturn • Day Sat • Discipline, longevity, structure • Exalted: Libra • Debilitated: Aries • Gem: Blue Sapphire • Mantra: Om Shanaye Namah
Rahu • North node • Obsession, foreign, sudden gain • Exalted: Taurus • Debilitated: Scorpio • Gem: Hessonite • Mantra: Om Rahave Namah
Ketu • South node • Detachment, moksha, surgery • Exalted: Scorpio • Debilitated: Taurus • Gem: Cat's Eye • Mantra: Om Ketave Namah
Read your full chart at /kundli to see how all nine grahas are placed for you specifically — every interpretation in this guide assumes you know your own chart, which takes about 60 seconds to generate.