Two traditions, briefly
Jyotish, Vedic astrology, is the astrological tradition of India. Its classical texts include Varahamihira’s Brihat Jataka from the sixth century CE and the Brihat Parashara Hora Shastra, attributed to the sage Parashara, whose date is debated. It uses the sidereal zodiac, nine grahas (the seven visible planets plus the lunar nodes Rahu and Ketu), 27 lunar mansions called nakshatras, divisional charts, and a system of planetary periods called dashas. It is still part of everyday life for many families in India and across South Asia, from naming ceremonies to marriage matching.
Western astrology descends from Hellenistic astrology of the Greek-speaking Mediterranean, passed through Persian, Arabic and medieval Latin astrology, and reshaped in the twentieth century by psychological approaches and newspaper Sun-sign columns. It uses the tropical zodiac and adds the outer planets Uranus, Neptune and Pluto.
The two met early. The Yavanajataka, a Sanskrit text based on Greek horoscopic astrology from the early centuries CE, is one well-known meeting point, though how much each tradition owes the other is debated. That shared ancestry is why so much of the basic grammar still matches.
Aurae works in the Western tradition: tropical zodiac, Whole Sign houses, mean lunar nodes. It does not compute rashi, nakshatras or dashas. The Moon sign calculator gives your tropical Moon sign; your Vedic Moon sign may differ, for reasons explained below.
Side by side
| Vedic (Jyotish) | Western | |
|---|---|---|
| Zodiac | Sidereal, fixed to the stars; the Lahiri ayanamsa is the standard in India | Tropical, fixed to the March equinox |
| The sign you lead with | Moon sign (rashi) and rising sign (lagna) | Sun sign, or the Big Three of Sun, Moon and Rising |
| Houses (bhavas) | Whole Sign houses traditionally; variants such as the Sripati method and bhava chalit charts also exist | Quadrant systems such as Placidus are common; Whole Sign is used in Hellenistic and many modern practices |
| Bodies used | Nine grahas: Sun, Moon, Mars, Mercury, Jupiter, Venus, Saturn, Rahu, Ketu | The same seven planets and the nodes, plus Uranus, Neptune and Pluto, often Chiron |
| Aspects | Graha drishti, counted by whole sign | Mostly by exact angle, with orbs |
| Timing | Vimshottari dasha periods (a 120-year cycle) plus gochara, transits counted from the Moon sign | Transits, secondary progressions, solar returns and annual profections |
| Lunar mansions | 27 nakshatras of 13°20′ each | Not part of mainstream practice |
| Extra charts | Divisional charts (vargas), especially the navamsa (D9) | Not standard |
Two of these rows carry most of the confusion. The zodiac row is why your signs shift (see why your sign is different in Vedic astrology for the arithmetic). The second row is why a Vedic astrologer asks for your Moon sign when you expected to give your Sun sign.
Nakshatras and dashas in one paragraph each
The nakshatras divide the zodiac into 27 equal segments of 13°20′, each with its own name, ruling planet and character, and each split into four padas of 3°20′. The nakshatra your Moon occupies at birth is one of the most personal facts in a Vedic chart.
The Vimshottari dasha system divides a 120-year cycle among the nine grahas: Ketu 7 years, Venus 20, Sun 6, Moon 10, Mars 7, Rahu 18, Jupiter 16, Saturn 19 and Mercury 17. Which period you are born into depends on your Moon’s nakshatra, and how far through it the Moon has travelled sets how much of that first period remains. Jyotish reads each period as coloured by its planet, and divides it into sub-periods (antardashas) run by the other eight grahas in the same order.
Divisional charts and transits
A Vedic astrologer rarely reads the birth chart alone. Divisional charts (vargas) cut each sign into smaller parts and build a new chart from them. The best known is the navamsa, or D9, which splits each sign into nine parts of 3°20′; it is read especially for marriage and for the underlying strength of each planet. Western astrology has no direct equivalent.
Transits (gochara) are counted from the Moon sign rather than from the Ascendant. The best-known example is Sade Sati, Saturn’s passage through the sign before your Moon sign, your Moon sign itself and the sign after it, about seven and a half years in all. It is one of the most discussed transits in Jyotish, traditionally treated as a demanding period and read by many astrologers today as a long stretch of responsibility and slow consolidation. Western astrology frames Saturn’s cycle differently, around the Saturn return at about 29 and 58, so the two traditions draw attention to different years.
Rashi is usually not your zodiac sign
"Rashi" simply means sign. But when someone asks for your rashi, they almost always mean your chandra rashi: the sidereal sign the Moon was in when you were born. That can differ from your Western Sun sign, because it is a different body, and from your tropical Moon sign, because the zodiacs are about 24° apart.
Example (hypothetical chart)
Tropical Sun at 5° Aries, tropical Moon at 12° Cancer. In Western terms this person is an Aries with a Cancer Moon. Shift both by about 24° into the sidereal zodiac and the Sun moves to about 11° Pisces while the Moon moves to about 18° Gemini. Their rashi is Mithuna, Gemini. Neither Western sign appears in the Vedic summary.
The Sanskrit names map one to one onto the Western ones:
| Western | Sanskrit | Western | Sanskrit |
|---|---|---|---|
| Aries | Mesha | Libra | Tula |
| Taurus | Vrishabha | Scorpio | Vrishchika |
| Gemini | Mithuna | Sagittarius | Dhanu |
| Cancer | Karka | Capricorn | Makara |
| Leo | Simha | Aquarius | Kumbha |
| Virgo | Kanya | Pisces | Meena |
The names match, but the boundaries differ. Mesha in a Vedic chart and Aries in a Western chart are the same sign in name and meaning but cover different stretches of sky.
The lagna works the same way. It is the rising sign, the sign on the eastern horizon at birth, and it shifts by the same 24°. Your tropical rising sign is in the Sun, Moon and Rising calculator; your sidereal lagna is usually the sign before it, unless your tropical Ascendant falls late in its sign.
Where the two systems agree
- ✦Rulerships. Both use the same seven traditional rulers: Mars rules Aries and Scorpio, Venus Taurus and Libra, Mercury Gemini and Virgo, the Moon Cancer, the Sun Leo, Jupiter Sagittarius and Pisces, Saturn Capricorn and Aquarius. Jyotish gives no signs to Uranus, Neptune or Pluto; modern Western astrology adds them as co-rulers, which is itself a contested modern convention.
- ✦Exaltations. The exaltation signs match: Sun in Aries, Moon in Taurus, Mercury in Virgo, Venus in Pisces, Mars in Capricorn, Jupiter in Cancer, Saturn in Libra. The traditions differ on some of the exact degrees within those signs.
- ✦Whole Sign houses. Treating each sign as one house is the traditional method in Jyotish and the earliest well-documented method in Hellenistic astrology. Aurae uses it.
- ✦The lunar nodes. Rahu and Ketu are the North and South Node. Same points in the sky, different sign labels and different readings.
Aspects look different but are closer than they seem. In Jyotish, graha drishti is counted by whole sign: every planet aspects the 7th sign from itself; Mars also aspects the 4th and 8th, Jupiter the 5th and 9th, and Saturn the 3rd and 10th. These aspects are one-directional, so Mars can aspect a planet that does not aspect Mars back. Modern Western astrology measures aspects by exact angle with an allowed orb. Hellenistic astrology also counted aspects between whole signs, so the sign-based approach has Western roots too.
Which should you use?
Choose by what you want from a chart, not by which is "truer". No established test shows either system to be more accurate.
- ✦Jyotish suits you if you want a detailed timing system (the dashas), the nakshatras, divisional charts, or the Moon-sign and nakshatra-based marriage matching (Ashtakoota, or guna milan) used across India. It also suits you if your family already works with a Vedic astrologer, because the readings will share a language.
- ✦Western astrology suits you if you want a chart tied to the seasons, a psychological and descriptive reading style, the outer planets, or tools built around transits, the Big Three and Sun-sign horoscopes.
A practical way to see the difference: ask both traditions when a period of change will come. A Jyotish reading will start from your current dasha and sub-period and then look at transits from your Moon sign. A Western reading will start from slow transits to your natal planets and angles, and perhaps your progressed Moon or your profected year. Both give dates; they get there by different routes.
Many people use both. The one rule is to keep each system’s pieces together: read sidereal signs with Jyotish meanings and tropical signs with Western meanings. Reading a sidereal Moon sign through a Western Moon-sign description mixes two different measurements.
Aurae is a Western, tropical tool. It calculates tropical charts with Whole Sign houses, your Big Three and Western transits. It does not compute sidereal charts, rashi, nakshatras or dashas.
Vedic and Western astrology: short answers
Is my rashi my zodiac sign?
In most cases, no. Your rashi is normally your sidereal Moon sign; your everyday Western zodiac sign is your tropical Sun sign. They are different bodies measured in different zodiacs, so they often differ.
Why do Indian apps show a different sign from Western ones?
Two reasons that stack: they use the sidereal zodiac, about 24° behind the tropical one, and they lead with the Moon sign. Either one alone can change the sign you see.
Does Aurae do Vedic charts?
No. Aurae calculates tropical charts with Whole Sign houses and the mean lunar node. It does not compute sidereal positions, rashi, nakshatras or dashas.
Is a Vedic Sun sign the same as a Western Sun sign?
Only for people born with the Sun in roughly the last 6° of a tropical sign. For everyone else the sidereal Sun sign is the one before.