The Surya Siddhanta is an ancient Sanskrit astronomical text that is considered the primary source for Vedic astrology. It contains detailed information on planetary positions, zodiac signs, and astrological calculations.

In Vedic astrology, the Moon is considered the most important celestial body as it is believed to influence a person's mind, emotions, and overall well-being.

Lagna, also known as the Ascendant, refers to the zodiac sign that is rising on the eastern horizon at the time of a person's birth. It is considered a crucial factor in determining an individual's personality and life path.

Rahu Ketu Dasha is not a recognized planetary period or 'dasha' in Vedic astrology. The other options, Vimshottari Dasha, Ashtottari Dasha, and Yogini Dasha, are commonly used systems for determining the duration and effects of planetary influences.

Raja Yoga is a specific combination of planets that is believed to confer power, authority, and success in Vedic astrology. It is considered one of the most auspicious yogas and is said to bring about significant achievements and accomplishments in life.

Mercury is associated with intelligence, communication, and learning in Vedic astrology. It is believed to influence a person's ability to acquire knowledge, express themselves effectively, and engage in intellectual pursuits.

Bhava refers to the placement of a planet in a specific sign or house in Vedic astrology. Each house represents different areas of life, and the placement of planets in these houses influences the individual's experiences and outcomes in those areas.

Venus is not considered a malefic planet in Vedic astrology. It is associated with love, beauty, pleasure, and material comforts. The other options, Mars, Saturn, and Rahu, are generally considered malefic planets and can bring challenges and obstacles in a person's life.

Antardasha refers to the specific time period during which a particular planet is said to exert its strongest influence in Vedic astrology. It is a sub-period within a larger planetary period or 'dasha' and can last for several months or years.

Jupiter is associated with wealth, prosperity, and material abundance in Vedic astrology. It is considered a benefic planet and is believed to bring good fortune, success, and expansion in various areas of life.

Nakshatra refers to the specific degree or position of a planet in a sign in Vedic astrology. Each nakshatra is associated with a specific deity, symbol, and set of characteristics, which can influence the individual's personality and life experiences.

Mars is not considered a benefic planet in Vedic astrology. It is associated with energy, passion, and drive, but can also bring challenges, conflicts, and accidents. The other options, Jupiter, Venus, and Mercury, are generally considered benefic planets and are believed to bring positive influences in a person's life.

Kaal Sarpa Yoga is a specific planetary combination that is believed to bring about sudden and unexpected changes in life in Vedic astrology. It occurs when all the planets are placed on one side of the Rahu-Ketu axis, creating a snake-like formation.

Saturn is associated with longevity, health, and vitality in Vedic astrology. It is considered a slow-moving planet that brings about gradual but significant changes in a person's life. It is also believed to govern discipline, hard work, and perseverance.

Vipareeta Raja Yoga is a specific planetary combination that is believed to bring about spiritual awakening and transformation in Vedic astrology. It occurs when a benefic planet is placed in a malefic sign or vice versa, creating a situation where the planet's positive qualities are enhanced while its negative qualities are minimized.