Rahu represents obsession and desire in a human being. Rahu is considered the head of a demon that became immortal as he drank nectar. The things represented by the house/sign-in in which Rahu is placed express the same obsession. Rahu is a shadow planet and does not have a physical existence but has a great impact on the earth's living beings. Rahu/Ketu indicates the karmic desire of the past and present of the native.
In the first house, Rahu makes one worldly, someone who likes being in front and a centre of things like the Sun. Rahu usually produces a politician in this house, yet completely damages the chances of getting married or ever being happy in married life. Only committed marriage happens when Jupiter is in the 7th house sitting with Ketu since Rahu and Ketu are always 7 houses apart.
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In the second house, Rahu gives wealth, but only after 34, and it gives it in the massive amount. Rahu in the 2nd house makes the native fight or argue with his or her family and relative, he or she has a different view on the family, and usually these folks either move out of the house at an early age, or they move to a foreign land, as Rahu in 2nd, 4th, 9th, and 12th house take a person to foreign lands.
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Rahu in the 3rd house does very well since Rahu loves the whole glamour scene, and being in the media house, it becomes worldly. This is also a good house to have a Rahu for the technical field, good education, and wealth through business. This person is very clever and deceptive in business.
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This is not a good position for Rahu as it damages peace at home, and usually, this person is more of a party person and a hanging-out-on-a weekend kind of person than staying at home. However, they desire to have a peaceful, lovely home which they do get after the age of 32.
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This is a neutral house for Rahu, as it makes a person very creative, gives wealth through investments, but also damages the chances of having children till a very late age, perhaps after 37-42. Rahu in the 5th house also damages the education of the native.
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This is the best position for Rahu as it not only gives victory over enemies, it also gives lots of wealth through litigation and law. Most people with this position become lawyers. Rahu in the 6th, 7th, and 10th houses usually produces a lawyer.
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This is again not a good placement for Rahu in terms of married life, this person will cheat on their partner redundantly. This is however a good position for business, reaching a mass audience and gains through wife.
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Rahu in the 8th house makes the person’s life very difficult in terms of health and accidents. This is one of the worst positions to have Rahu in. Ketu, however, in the 8th house is far better for a long life. Rahu not only gives accident, it could also lead to jail time. This Rahu however produces a doctor and a surgeon with a good aspect on Rahu. Most people in the medical field have Rahu in the 8th house.
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In the 9th house, it is a difficult position for Rahu to be in, as this is the house of law, religion, culture, and tradition while Rahu goes against all of these things. Rahu either makes a person very religious, who usually leaves their religious beliefs later on in life, or the person never believes in religion.
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Rahu in the 10th house is the best position for Rahu to be in. Here, Rahu gives worldly fame, strong will, and lots of wealth through the career of any choice. Rahu in the 10th house, however, makes a person workaholic. The native’s world is all about work and little play; however, if Mercury is sitting with Rahu, then it nullifies this effect.
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Rahu in the 11th house gives a massive amount of wealth, especially during its Dasha. This Rahu gives a story of rag to riches, a self-made billionaire. This positive side, however, is not good for having children; either the native will suffer a miscarriage or has an abortion at least once in life.
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This is not a good position for Rahu in the 12th house, as here it can make the native’s mind, house, and aura haunted with spirits, black magic and become a victim of evil mysticism. Even though Rahu takes a person to foreign lands for permanent settlement, it also might put the native in trouble with the law. This position, however, makes the native an excellent science fiction author, especially if this person has Guru Chandal Yoga (Conjunction of Rahu and Jupiter in 12th house).
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In conclusion, Rahu gives the best results in the 2, 3, 6, 10, and 11th houses, where everywhere else it creates delay regarding the matter of that house.