First House is commonly known as the "Ascendant" or "Lagna". It is the most important of the twelve houses in horoscope. In Vedic Astrology, it is referred to as “Tanur or Tanu Bhava”, which means literally, “the house of the body”. First House in horoscope represents the personality, physical appearance, character, temperament, self-identity, strengths, weaknesses, physical constitution as well as health. By studying the sign and planets placed in the first house, one can easily decipher a lot about one"s inner and outer self. First house thus is very important in terms of making astrological predictions.

Effects of Planets in First House
The planets cause various effects when they are positioned in the First House of the Horoscope. They are mentioned below:

Sun in First House: This is the planet of vitality and individuality. The person has a strong will and sense of self, and they like lots of attention. They are an independent person with leadership ability. Positively, they are healthy constitution, generous, confident and dignified. Negatively, they are authoritative, egotistical and dictatorial.

Moon in First House: This is the planet of emotions and instincts. They are imaginative in the way they express themselves and intuitive about other people. Home and family mean a great deal to them, and remember their childhood with nostalgia. They want to be appreciated and admired, and would like to be famous. Positively, they are receptive, romantic and curious. Negatively, they are oversensitive, moody and have a tendency to dissipate energies.

Mercury in First House: This is the planet of the mind. They are inquisitive, and humorous, and they need intellectual challenge. They like to travel and enjoy talking to people. They may be known as an ideal person and are probably a good mimic. Positively, they are adaptable, active and good at writing and speaking. Negatively, they are restless, indecisive and think too much about themselves.

Venus in First House: This is the planet of love and pleasure. They are affectionate, flirtatious, and usually quite good-looking. They have charming social manners and like to have companionship. Their appearance is important to them. Positively, they are sympathetic, artistic and a cheerful personality. Negatively, they are lazy, narcissistic and too fond of pleasure and luxury.

Mars in First House: This is the planet of energy and assertiveness. They are impulsive and independent, and dislike taking advice from others. They approach new projects with energy and confidence, and are capable of hard work. Positively, they are strong body, self-assertive and courageous. Negatively, they are inconsiderate, pushy, domineering and accident-prone.

Jupiter in First House: This is the planet of luck and expansion. They have a buoyant, cheerful disposition, and are a success socially. They inspire confidence, are optimistic, and tend to be generous with their time and energy. Positively, they are jovial, broad-minded, expansive and kind. Negatively, they are self-indulgent, innocent and with a marked tendency to gain weight. They are sometimes faithless in love.

Saturn in First House: This is the planet of discipline and limitation. They are persistent, have organizing ability, and are capable of self-discipline. They are patient and a bit shy, feel nervous underneath, and want their talents and work to be recognized. Positively, they are industrious, good powers of endurance and a keen sense of responsibility. Negatively, they are stubborn and set in ways, afraid of new beginnings and secretive.

Rahu in First House: They are usually courageous, gallant, brave and do not mind taking risks as well. They are free souls and do not bear any sort of restrictions. They often become insensitive towards others grief and agony and think about themselves only. These natives are prone to personality disorders.

Ketu in First House: They have a dynamic and magnetic personality. They shall always feel a sense of adventure driving their life towards growth and success. This position of Ketu also gives the native psychic abilities and strong intuition. It can affect the longevity of the person in some cases.