What is a Graha? (And what it is not)
'Graha' does not mean planet in the Sanskrit. It means 'to grasp, to seize' and 'the one who controls'. The physical body of each graha is called planet. Grahas are karmic forces that seize your prana (life force) and influence your mind, body, and behavior. Grahas shows the ability of celestial events to influence and control the occurrence of events on planet earth.
In Vedic Astrology only planets that are visible to the naked eye are considered as grahas.
What each Graha brings to your door?
Sun = Soul force, Ego, Confidence
Moon = Emotions, Mind
Mars = Energy, Aggression, Will
Rahu = Obsession, illusion
Ketu = Detachment, Past life
Takeaway:
Grahas are karmic delivery tools. They are neither good nor bad. They simply activate what you are meant to face or grow through.