Vastu and jyotish (Astrology) cannot do without each other. Since they are like air and water; they are guiding factors. In the socio-economic context of the ancient and middle ages. jyotish (Astrology) and thus is old as the Vedas themselves. Jyotish literally means ‘light of god’ or ‘path to fulfillment of desires’. Astrology represents ‘eyes’ in the vedic body as it enables us to see our past, present and future. This ‘divine eye’ is achieved by those who are well versed in the scientific study and application of the language of heavenly bodies. These heavenly bodies have great influence on our life and houses.
In Brief : Now, let us deal with planets and their effects on house, in view of the science of Astrology.
Sun : Sun is the soul (atmakaraka) besides being Pitrkaraka, and governing planet of the fifth sigh Leo of the zodiac. In Grhavastu, the window on the East should be such as to allow maximum sun-light, otherwise it will disturb the prosperity of a family.
Moon : The left side of a house is indicative of mother or daughter. If the left window happens to be a puja room, women will enjoy divine perception, wisdom (Moon + Jupiter); in case a room is full of darkness with materials dumped, the house wife suffers ill-health.
Mars and Venus : The Kitchen should be in south-East ( agneyi ). Mars is the planet ruling the south. But it is Venus who governs a kitchen. If a kitchen is situated opposite to a bedroom. Although there may a happiness, there will be ill-health. In some houses, where both the kitchen and bathroom are combined, great hardship is felt and earnings go the waste.
Mercury : Mercury governs the North, verandah, hall vistors’ room and sit-out. If there is a puja room in the hall itself, the owner of the family enjoys great benefits from lands. If the hall is attached to bedroom, the house-wife will be earning well. If the hall suffers for want of ventilation or darkness, there will be immoral affairs and earnings through shady means.
Jupiter : Jupiter rules the direction of North-East which is suited for proper puja room. Suppose the door is directly facing a puja room, even though there be hardship in life, later on one would enjoy prosperity.
Saturn : it governs the West and is the best friend of Rahu. Rahu and Ketu represent main door and rear door, respectively. Food material stored in the West (store room, etc) is auspicious and leads to prosperity.
Rahu : It governs the South-West. Unused materials, and toilets are good here as rahu governs the main door, the entrance door must be larger than the other doors.
Ketu : The direction of ketu is also the North-East. Ketu governs small rear door, the bath rooms, ditches and staircase. If the staircase leading to the first floor is near the main door entrance, it indicates self-deception and is not auspicious.