In one paragraph
Vedic astrology works with nine grahas: the Sun, the Moon, the five planets visible to the naked eye, and the two lunar nodes, Rahu and Ketu. "Graha" does not mean planet; it means "that which seizes" — a force that takes hold of events. Each graha has natural significations, signs it rules, friends and enemies, and a characteristic speed. The outer planets Uranus, Neptune and Pluto have no role in the classical system.
The nine grahas at a glance
| Graha | Sanskrit | Rules | Time in one sign | Naturally signifies |
|---|---|---|---|---|
| Sun | Surya | Leo | about 1 month | The self, vitality, father, authority and government |
| Moon | Chandra | Cancer | about 2¼ days | The mind, emotions, mother, comfort and the public |
| Mars | Mangala | Aries, Scorpio | about 6–8 weeks | Energy, courage, siblings, land, conflict and surgery |
| Mercury | Budha | Gemini, Virgo | about 3–4 weeks | Intellect, speech, learning, trade and calculation |
| Jupiter | Guru | Sagittarius, Pisces | about 1 year | Wisdom, teachers, children, wealth, law and dharma |
| Venus | Shukra | Taurus, Libra | about 3–4 weeks | Love, marriage, art, comfort, vehicles and refinement |
| Saturn | Shani | Capricorn, Aquarius | about 2½ years | Discipline, labour, longevity, delay and responsibility |
| Rahu | Rahu | No sign of its own | about 18 months | Ambition, obsession, the foreign and the unconventional |
| Ketu | Ketu | No sign of its own | about 18 months | Detachment, intuition, loss, liberation and past karma |
Why the Sun and Moon are called planets
The word graha is older than the modern definition of a planet. It covers anything that visibly moves against the fixed stars and "grasps" life on earth: a star (the Sun), a satellite (the Moon), five planets, and two mathematical points (Rahu and Ketu). Translating graha as "planet" is a convenience, nothing more.
The seven visible grahas also give the week its days, in every Indian language and in most European ones: Ravivara for the Sun, Somavara for the Moon, Mangalavara for Mars, Budhavara for Mercury, Guruvara for Jupiter, Shukravara for Venus and Shanivara for Saturn.
Natural benefics and malefics
By nature, Jupiter and Venus are benefics. The Moon is benefic when it is waxing and bright, and Mercury is benefic unless it is joined by a malefic. The Sun, Mars, Saturn, Rahu and Ketu are natural malefics — the Sun mildly so.
"Malefic" does not mean harmful. It means a planet that works through pressure, separation or effort rather than ease. Saturn builds through discipline; Mars through confrontation. And natural nature is only the first layer: which houses a planet rules for your Lagna decides whether it acts as a friend to your chart. Saturn is the most helpful planet for Taurus and Libra ascendants precisely because it rules a kendra and a trikona for them.
Friends, enemies and neutrals
Each graha has a fixed, natural relationship with the others. It matters because a planet sitting in a friend's sign is comfortable, and one in an enemy's sign is strained.
| Planet | Friends | Neutral | Enemies |
|---|---|---|---|
| Sun | Moon, Mars, Jupiter | Mercury | Venus, Saturn |
| Moon | Sun, Mercury | Mars, Jupiter, Venus, Saturn | None |
| Mars | Sun, Moon, Jupiter | Venus, Saturn | Mercury |
| Mercury | Sun, Venus | Mars, Jupiter, Saturn | Moon |
| Jupiter | Sun, Moon, Mars | Saturn | Mercury, Venus |
| Venus | Mercury, Saturn | Mars, Jupiter | Sun, Moon |
| Saturn | Mercury, Venus | Jupiter | Sun, Moon, Mars |
Aspects: how a graha looks at other houses
In Vedic astrology a planet influences the house it occupies and also certain houses it "looks at". Every graha aspects the seventh house counted from itself. Three have additional, special aspects:
- Mars also aspects the 4th and 8th houses from itself
- Jupiter also aspects the 5th and 9th houses from itself
- Saturn also aspects the 3rd and 10th houses from itself
Some traditions give Rahu and Ketu the 5th and 9th aspects as well, like Jupiter; Astronaad follows that convention. Aspects are counted by whole houses, not by exact degrees.
Rahu and Ketu: the two that are not bodies
Rahu and Ketu are the points where the Moon's orbit crosses the Sun's apparent path. They have no mass and cannot be seen, yet they mark where eclipses happen, which is why the tradition treats them as grahas. They are always exactly opposite each other, always move backwards through the zodiac, and rule no sign of their own — they take on the character of the sign they occupy and the planets they join.
Frequently asked questions
- Why does Vedic astrology not use Uranus, Neptune and Pluto?
- The classical system was built on bodies visible without a telescope, and its rules — sign rulership, friendships, dasha periods — form a complete, closed scheme with nine grahas. Some modern practitioners note the outer planets, but they hold no rulership and no dasha.
- Which planets are benefic and which are malefic?
- Jupiter and Venus are natural benefics, along with a waxing Moon and an unafflicted Mercury. The Sun, Mars, Saturn, Rahu and Ketu are natural malefics. For any individual chart this is refined by which houses each planet rules.
- Which planet is the most powerful?
- There is no single answer. The Sun and Moon are the two luminaries and carry the most personal weight; Jupiter is the greatest natural benefic; Saturn has the longest-lasting influence. In a given chart, the most powerful planet is the one with the best dignity and placement.
- How long does each planet stay in one sign?
- Roughly: the Moon two and a quarter days, the Sun a month, Mercury and Venus about a month, Mars around six to eight weeks, Jupiter a year, Rahu and Ketu eighteen months, and Saturn two and a half years.
Work it out for yourself
These tools compute what this guide explains, from real astronomical positions.
- Kundli →Every graha's sign, house, nakshatra and dignity in your chart.
- Dosha & Remedies →Checks the Mars, Saturn and Rahu–Ketu patterns in your chart.
How this guide was written
The reference tables on this page are generated from the same data Astronaad’s calculators run on, so the guide and the tools cannot disagree. Where classical authorities differ, the text says so and names the convention Astronaad follows. Astrology is a traditional system of interpretation: nothing here is medical, legal or financial advice. Spotted an error? Tell us.