According to Vedic astrology, horary astrology is perfect for forecasting the length of one's life. Astrologers say that answering the question about one’s long life is not reasonable but as humans have an intrusive nature, they want to know their life span desperately with the help of horary astrology.

While predicting or analysing a chart, if there is no longevity in the native's chart, there is no use in having other yogas. In such circumstances, we must appreciate the greatest astrologer, Varahamihara, who could predict the death of the son of his king. This is one of the greatest proofs of our ancient Vedic astrology.

In Vedic astrology, the subject of longevity has been profoundly dealt with in a very meticulous manner. To start with, the life of a person is broadly classified into 6 different yoga, which are:

• Balarishta Yoga or the astrological combinations for child mortality or infantile death - This indicates that the child is vulnerable to an early death before 8 years.

• Madhya Rishta Yoga or the astrological combinations for teenage death - This indicates that the death will occur before the age of 19.

• Yogarista (Yogaja Ayu) Yoga, also known as Alpayu Yoga or the astrological combinations for death in prime age - This indicates that death will occur before 32 years of age.

• Madhyayu Yoga, or the astrological combinations for death during mid-life - This indicates a lifespan of 64 years.

• Deerghayu Yoga, or the astrological combinations for death during old age - This indicates that death will occur before 84 years.

• Purnayu Yoga, Amithayu or the astrological combinations for full lifespan indicate that death will occur after 100 years. Following Vimshottari dasa Purnayu, it extends up to a limit of 120 years.

Due to some malefic combinations of planets, their aspects and places also matter when producing malefic yogas. Here, the researcher gives detailed notes on malefic combinations as mentioned in astrological classics.

1.    Key Houses for Longevity

Before looking at the exact planetary combinations, it's important to know what the houses in a birth chart mean when it comes to longevity:

• Eighth House: This is the house of longevity; it shows how long people live, how they die, and what kind of death they have. Bad effects here can mean health problems or a shorter life span.

• Third House: This is the house of energy and courage, and it also has a big impact on how long someone lives. A strong third house means that you are healthy and full of life.

• First House (Ascendant): The Ascendant explains the details of the body and health in general. Being healthy and living a long life are linked to having a well-placed ascendant and its lord.

• Sixth House: Illnesses and problems are shown in this house. Those who have a strong sixth house can help you get through health problems and other problems.

2.    Benefic and Malefic Planets

In Vedic astrology, planets are divided into two groups: natural Benefic and natural Malefic.

• Jupiter, Venus, Mercury (when not in combust position), and the waxing Moon are all natural Benefic Planets.

• The Sun, Mars, Saturn, Rahu, Ketu, and the waning Moon are all natural Malefic Planets.

The location, aspect, and strength of these planets have a big effect on how long someone lives.

3.    Other essential planetary combinations for Purnayu:

As per Vedic astrology, Saturn is responsible for life span and in a kundli, the 8th house decides a person’s longevity. If a kundli has Saturn as the most powerful planet amongst other planets, sometimes Saturn, as per his nature, creates problems in the early life of the native. But slowly, as the native grows older, Saturn exalts its native with accomplishment.

• If an auspicious arrangement of the 8th house, Saturn, Ascendant and the lord of the ascendant are there in the native's Kundli, then they may have a long life.

• People may enjoy a long life if auspicious planets like Jupiter, Venus, or Mercury occupy the 8th house.

• The placement of the moon also plays a vital role in horary astrology to define the lifespan of a child.

• The Third House is important for living a long life because this house represents health and energy.  In the same way, the Eleventh House is important because it is the house of gains (3rd from the 9th). Good planets in the Third and Eleventh Houses, or their rulers in strong positions, promote full longevity.

• Kendras (1st, 4th, 7th, and 10th houses) and Trikonas (1st, 5th, and 9th houses) should be beneficial to you. If Jupiter, Venus, or a strong and well-placed Mercury are in these houses, they make the general positive energy in the chart stronger, which helps people live longer.

• When the lord of the Eighth House is in a Kendra (1st, 4th, 7th, 10th) or a Trikona (1st, 5th, 9th) from the ascendant, this yoga is formed, and good things happen. People think that this mix will give them long life and good health.

• People born under the Mrigashira or Punarvasu nakshatras are said to possess an extended lifespan. In these nakshatras, the presence of benefic planets might increase longevity.

• The Mahadasha (main period) and Antardasha (sub-period) of auspicious planets such as Jupiter, Venus, or Saturn in a favourable position have a good impact on one's lifespan.

• When favourable aspects influence the ruler of the Eighth House in either a Kendra (1st, 4th, 7th, 10th) or a Trikona (1st, 5th, 9th) from the ascendant, Sanjeevani yoga occurs, which gives an individual an extended lifespan and excellent physical well-being.

• The placement of malefic planets such as Mars, Rahu, or Ketu in this house may have a negative influence on one's life span. In this situation, one may be a victim of a conspiracy or accident.

• An afflicted 8th house and a debilitated lord of the 8th house may decrease the long life of a person.

• The aspect of an auspicious planet on the 8th house or lord of the 8th house is very good for a person’s long life, while the aspect of malefic planets in this position diminishes life span.

• Parallel things go wrong if Saturn is weakened in one’s horary chart. That means a native may lead a happy and affluent life in his early years but he may face severe problems as he grows up. In this way, the planetary position in a native’s horary chart specifies his or her life span and other things related to his or her longevity.

In Vedic astrology, Purnayau means "full longevity." It is a difficult but interesting subject to understand. It depends on the study of different planetary combinations, and positions of houses and yogas, which are already explained. Astrology can help you understand things. A healthy diet, positive thinking, and spiritual practices can also work together with astrological facts to improve your health and length of life. It is very important to remember that astrology is just a tool to help us get better at understanding and navigating our journey.