Sun, Moon, Mars, Mercury, Jupiter, Venus, Saturn, Rahu, Ketu — a short field guide to the nine, without the fear.
Ask most people what Saturn means and they will say "trouble". Ask what Rahu means and they will lower their voice. Neither is accurate, and the fear does real harm — it stops people from working with their charts at all.
The luminaries
Surya (Sun) governs the soul, the father, authority, bone and vitality. A strong Sun gives dignity; an afflicted one gives either arrogance or a persistent sense of being unseen.
Chandra (Moon) governs the mind, the mother, fluids, and the public. It is the fastest-moving graha and the most responsive to transit, which is why moods shift on a two-and-a-half-day rhythm.
The personal grahas
Mangal (Mars) is courage, siblings, land, surgery and appetite. It is not anger; it is the capacity to act, which becomes anger only when blocked.
Budha (Mercury) is speech, commerce, calculation and the nervous system. Mercury is the graha of the good student and the good negotiator.
Guru (Jupiter) is wisdom, children, wealth, the teacher and dharma itself. Its aspect on a house is considered protective in almost every school.
Shukra (Venus) is marriage, art, comfort, vehicles and the sweetness of life.
The teachers
Shani (Saturn) governs time, labour, the elderly, the poor, and everything earned slowly. Saturn is not cruel; it is exacting. It gives what was worked for, no more, and it does not accept shortcuts. The people who fear Saturn most are usually the ones being asked to do the work.
Rahu magnifies and obsesses — foreign things, technology, sudden rise, appetite without satiety. Ketu subtracts and detaches — moksha, research, past-life skill, indifference to worldly reward.
Reading them together
No graha acts alone. A weak Saturn aspected by Jupiter behaves nothing like a weak Saturn sitting with Rahu. This is why a list of "good" and "bad" planets is close to useless, and why a proper reading looks at the whole configuration before it says a single word about your life.