Astrology Basics | Planet Details, Aspects and Houses

Foundations

Astrology vs astronomy

Astronomy studies planets, stars, and space through observation, mathematics, and physics. Astrology uses the same sky as a symbolic framework to interpret tendencies in life, timing, and human experience.

In Vedic astrology, Jupiter is often called Guru or Brihaspati and is associated with wisdom, guidance, blessings, and protection. Astronomy does not assign such meaning, but it does show Jupiter as a massive planet whose gravity influences the solar system in important ways.

Keeping this distinction clear helps readers understand what Astrograha calculators are designed to do: they are interpretation tools rooted in Vedic tradition, not scientific instruments for astronomical measurement.

Astrology and astronomy are different disciplines, but understanding both helps the subject feel clearer and more grounded.

Planets

About planets

Vedic astrology mainly works with the Sun, Moon, Mercury, Venus, Mars, Jupiter, Saturn, Rahu, and Ketu. Each graha represents a specific part of life, and its results depend on sign placement, house placement, dignity, aspect, and planetary periods.

Sun (Surya) The Sun represents the soul, authority, vitality, and confidence. It is traditionally strong in Aries, weak in Libra, and at home in Leo.

Moon (Chandra) The Moon represents the mind, emotions, memory, and public response. It is traditionally strong in Taurus, weak in Scorpio, and at home in Cancer.

Mercury (Budh) Mercury represents communication, logic, trade, analysis, and adaptability. It is classically strong in Virgo, weak in Pisces, and rules Virgo and Gemini.

Venus (Shukra) Venus represents relationships, comforts, beauty, enjoyment, and refinement. It is strong in Pisces, weak in Virgo, and rules Taurus and Libra.

Mars (Mangal) Mars represents drive, courage, stamina, action, and conflict. It is strong in Capricorn, weak in Cancer, and rules Aries and Scorpio.

Jupiter (Guru) Jupiter represents wisdom, faith, higher learning, blessings, and expansion. It is strong in Cancer, weak in Capricorn, and rules Sagittarius and Pisces.

Saturn (Sani) Saturn represents duty, discipline, delay, endurance, responsibility, and karma. It is strong in Libra, weak in Aries, and rules Capricorn and Aquarius.

Rahu Rahu is a shadow planet connected with ambition, obsession, worldly desire, and unconventional growth. It does not own signs in the same way as classical planets, but it strongly colors the house it occupies.

Ketu Ketu is a shadow planet connected with detachment, past-life tendencies, spiritualization, separation, and inner realization. It often reduces worldly attachment while deepening introspection.

How to read them A planet should not be judged by one rule alone. Strength, house, sign, aspect, conjunction, and dasha together determine whether a graha helps smoothly or gives lessons through pressure.

Interpretation

Aspects of planets

Planetary aspects are important because they show how a graha influences another house or planet. Even when a planet is not placed in a house, its aspect can strengthen, disturb, delay, or activate the matters of that house.

Single-aspect planets Sun, Moon, Mercury, and Venus are generally read with their direct 7th-house aspect.

Special-aspect planets Mars, Jupiter, Saturn, Rahu, and Ketu need their additional traditional aspects to be considered separately.

Mars Mars aspects the 4th, 7th, and 8th houses from its placement. Its aspect can intensify action, pressure, urgency, or conflict depending on dignity.

Jupiter Jupiter aspects the 5th, 7th, and 9th houses. Its aspect is usually treated as protective, instructive, and supportive when Jupiter is strong.

Saturn Saturn aspects the 3rd, 7th, and 10th houses. Its aspect can bring responsibility, delay, endurance, and long-term pressure.

Rahu and Ketu The lunar nodes are also often read with 5th, 7th, and 9th influence patterns. Their effects are usually unconventional, karmic, or destabilizing before clarity appears.

An aspect should always be judged from the condition of the planet casting it. A benefic aspect can support a house, while an afflicted or malefic aspect can create challenges in the same area.

House meanings

Planets in houses

The twelve houses show the major areas of life. A house is not only a topic label. Its actual result depends on the planets placed there, the sign on that house, the house lord, and the aspects it receives.

1st HouseLagna, self, body, temperament, vitality, and overall life direction.

2nd HouseFamily, speech, accumulated wealth, food habits, and stored resources.

3rd HouseSiblings, courage, communication effort, initiative, and self-made progress.

4th HouseMother, home, emotional comfort, property, land, and domestic peace.

5th HouseEducation, intelligence, children, mantra, creativity, and past-life merit.

6th HouseService, debt, disease, competition, litigation, and daily struggle.

7th HouseMarriage, partnership, agreements, public interaction, and business platform.

8th HouseSudden events, secrets, transformation, inheritance, vulnerability, and longevity issues.

9th HouseDharma, fortune, higher learning, teachers, blessings, pilgrimage, and long-distance travel.

10th HouseCareer, status, responsibility, reputation, work output, and visible action in the world.

11th HouseProfits, gains, social network, elder siblings, ambitions, and fulfillment of desires.

12th HouseLoss, expenditure, retreat, foreign residence, sleep, isolation, and moksha-oriented themes.

Marriage matching

Nakshatra compatibility - 10 Porutham

In many South Indian marriages, Nakshatra matching is used as an early compatibility check between the boy and the girl. The traditional South Indian method evaluates ten porutham factors, each looking at a different part of married life.

Dhina Match - Dhina Porutham Dhina match represents longevity and health. It is traditionally examined for a prosperous life with fewer obstacles related to disease, poverty, and general wellbeing.

Gana Match - Gana Porutham Gana match represents compatibility of temperament. It is used to judge behavior, mutual understanding, and the ability of the couple to cooperate in married life.

Mahendra Match - Mahendra Porutham Mahendra match represents the wellbeing and growth of the family. It is associated with family development, continuity, and overall prosperity after marriage.

Sthree Dheerkam Match - Sthree Dheerkam Porutham Sthree Dheerkam is linked with the longevity of the bride. In traditional reading, it reflects whether the bride is expected to enjoy a long married life.

Yoni Match - Yoni Porutham Yoni match represents physical and intimate compatibility. It is used to assess comfort, attraction, and harmony in the conjugal side of marriage.

Rasi Match - Rasi Porutham Rasi match represents unity between the couple. Traditional interpretation connects it with harmony, shared direction, and reduced chances of repeated disputes or family strain.

Rasi Athipathi Match - Rasi Athipathi Porutham Rasi Athipathi match represents friendliness between the couple. It is checked to understand whether the couple can build ease, goodwill, and mutual support.

Vasiya Match - Vasiya Porutham Vasiya match reflects attraction and adjustability. It is traditionally used to judge liking, intimacy, confidence, and the ability to adapt to each other.

Rajju Match - Rajju Porutham Rajju match represents the durability of married life. Because Rajju is associated with the marriage knot, its absence is traditionally treated as an important caution.

Vethai Match - Vethai Porutham Vethai indicates Vedha or conflict between the stars. If the boy's and girl's Nakshatras become Vedha to each other, it is traditionally treated as a no-match condition.

Astrograha automates these ten porutham checks in the Star Match calculator and also provides a compatible stars lookup for a selected Nakshatra.

Find star compatibility Find all compatible star matches