Vedic astrology uses nine planets, the navagraha. Seven are the visible lights (Surya (Sun), Chandra (Moon), Mangal (Mars), Budha (Mercury), Guru (Jupiter), Shukra (Venus), Shani (Saturn)) and two are the lunar nodes, Rahu and Ketu, the shadow planets where eclipses happen. Each graha is a karaka, a significator, meaning it stands for particular themes in life.
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SuryaSunSoul, authority, vitalityRules Simha (5)
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ChandraMoonMind, emotions, motherRules Karkat (4)
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MangalMarsEnergy, courage, actionRules Mesh (1) & Vrishchik (8)
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BudhaMercuryIntellect, speech, tradeRules Mithun (3) & Kanya (6)
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GuruJupiterWisdom, growth, fortuneRules Dhanu (9) & Meen (12)
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ShukraVenusLove, beauty, comfortRules Vrishabh (2) & Tula (7)
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ShaniSaturnDiscipline, time, karmaRules Makar (10) & Kumbh (11)
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RahuNorth nodeDesire, ambition, the suddenShadow planet
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KetuSouth nodeDetachment, spiritualityShadow planet
What each planet signifies
| Planet | Signifies | Rules the sign(s) |
|---|---|---|
| Surya | Soul, father, authority, vitality | Simha (Leo) |
| Chandra | Mind, mother, emotions | Karka (Cancer) |
| Mangal (Mangala) | Energy, courage, siblings, drive | Mesha (Aries), Vrishchika (Scorpio) |
| Budha | Intellect, speech, business | Mithuna (Gemini), Kanya (Virgo) |
| Guru | Wisdom, wealth, children, luck | Dhanu (Sagittarius), Meena (Pisces) |
| Shukra | Love, marriage, art, comfort | Vrishabha (Taurus), Tula (Libra) |
| Shani | Discipline, karma, delay, longevity | Makara (Capricorn), Kumbha (Aquarius) |
| Rahu | Ambition, obsession, the foreign | (shadow, no sign) |
| Ketu | Spirituality, detachment, moksha | (shadow, no sign) |
Benefic and malefic
Planets are loosely grouped by nature. Benefics (Guru, Shukra, well-placed Budha and a waxing Chandra) tend to protect and bless. Malefics (Shani, Mangal, the Surya, Rahu and Ketu) tend to challenge and push. This is not "good vs evil": a malefic like Shani placed well gives discipline and lasting success; a benefic placed poorly can make one lazy. Context is everything.
Strong and weak: exaltation and debilitation
A planet's power depends heavily on the sign it sits in. Every planet has one sign where it is exalted (strongest) and the opposite sign where it is debilitated (weakest):
- Surya is exalted in Mesha, weak in Tula.
- Chandra is exalted in Vrishabha, weak in Vrishchika.
- Guru is exalted in Karka, weak in Makara.
- Shani is exalted in Tula, weak in Mesha.
So "Guru in Karka" is a wonderful, strong Guru, while "Guru in Makara" struggles. You can read any of these combinations in detail on the planet pages (for example, Shani in Kumbha).
A quick example
Suppose your chart has Shukra in Tula. Shukra signifies love and beauty, and it owns Tula, so it sits in its own sign, comfortable and strong. This favours a refined, romantic, artistic nature and generally supports relationships. One placement, read in two steps: what the planet means, and how happy it is in that sign.
The grahas as karakas
Karaka means significator. Each graha permanently stands for certain people and themes wherever it appears, and this is the layer of meaning you carry into every chart.
| Graha | Karaka for | Natural role |
|---|---|---|
| Surya | Father, authority, vitality, the soul | The king |
| Chandra | Mother, mind, emotion, the public | The queen |
| Mangal | Siblings, courage, land, surgery | The commander |
| Budha | Speech, trade, intellect, writing | The prince |
| Guru | Teachers, children, wealth, dharma | The counsellor |
| Shukra | Spouse, art, pleasure, vehicles | The minister |
| Shani | Longevity, labour, sorrow, the old | The servant |
| Rahu | Obsession, foreign things, technology | The outsider |
| Ketu | Detachment, past skill, liberation | The renunciate |
The classical "cabinet" framing on the right is a memory aid, and it also encodes how the grahas behave together. A king and a servant sitting in the same house rarely cooperate comfortably.
Rahu and Ketu are not ordinary planets
Rahu and Ketu are not physical bodies. They are the two points where the Chandra's path crosses the Surya's, which is why eclipses only happen near them. Read more in the guide to the lunar nodes and eclipses.
Three practical consequences:
- They are always exactly opposite each other, six houses apart.
- They move backwards through the zodiac, so they are always retrograde.
- They own no sign, so they take much of their meaning from their dispositor, the ruler of the sign they occupy.
Rahu magnifies whatever it touches and gives hunger without satisfaction. Ketu does the reverse: it empties a house and gives skill without interest.
Natural benefic and malefic, with the caveat
The usual grouping is benefic (Guru, Shukra, well-placed Budha, a waxing Chandra) and malefic (Shani, Mangal, Surya, Rahu, Ketu, a waning Chandra).
Treat this as a starting point only. Two adjustments matter immediately. A benefic that rules a difficult house can still cause trouble, and a malefic that rules a good house can protect. And functional nature, which depends on your Lagna, often overrides natural nature entirely. For a Makar Lagna, Shani rules the 1st and behaves very differently from Shani for a Karka Lagna.
Combustion and retrogression
Two conditions change a graha's output and are worth knowing early.
Combustion (Asta) happens when a graha sits too close to Surya and is burnt by it. The planet's significations weaken even though it may look well placed.
Retrogression (Vakri) is when a graha appears to move backwards. Classical opinion treats a retrograde planet as unusually strong but inward turned, delivering its results on its own schedule rather than the expected one. See the practical guide to Budha retrograde.
Frequently asked questions
Why nine planets and not the outer ones? Jyotish is built on what is visible to the eye plus the two nodes. Uranus, Neptune and Pluto are not part of the classical system and the rules were never written for them.
Is Shani always bad? No. Shani is the graha of sustained effort. Well placed, it produces the kind of success that lasts, which is precisely what Sade Sati is often misread as denying.
What does it mean if a graha is exalted? It sits in its single strongest sign. That is covered in the lesson on dignity and planetary strength.
Key takeaways
- Nine grahas, each a significator of specific life themes.
- Each planet rules one or two signs and has an exaltation and a debilitation.
- A planet's strength depends on the sign it occupies.
- Next: the twelve houses, the areas of life planets act on.
Related reading
Where to go next
- When two grahas share a sign they merge into one force. Start with planet conjunctions, or a common pair like Surya and Budha or Guru and Shukra.
- How to tell a strong graha from a weak one: exaltation, debilitation and planetary strength.
- Which grahas help each other: planetary friendships.
- Timing through the grahas: the Vimshottari dasha system.