Parashari

Parashari Jyotisha is named for the sage Parāśara, to whom the Bṛhat Pārāśara Horā Śāstra (BPHS) is attributed. The text is long, with about a hundred chapters, and it covers the planets, signs, houses, yogas, dashas, divisions of the chart and remedies. Its authorship is traditional. Scholars find evidence of layers, with some chapters older and others added over many centuries, and the text we have today is a compilation that took form in the medieval period.

The school is the default in India for a simple reason: it is the most complete. A student who learns Parashari first can then place the other lineages in relation to it. Most modern Jyotisha software, textbooks and almanacs are Parashari in structure.

Every Parashari chart traces back to one colossal source: the Brihat Parashara Hora Shastra (BPHS), attributed to sage Parashara (roughly 3000–1500 BCE by tradition, compiled in its current form much later). It is not a hint-book but an operating manual — it defines the signs, the planets, the houses, the combinations (yogas) and, most distinctively, the dasha: planetary periods that map when a chart's promises unfold.

Where Western astrology emphasizes character, Parashari Jyotisha emphasizes timing. A planet may promise marriage, career peaks or illness — the Vimshottari Dasha sequence decides when.

A chart begins with the Lagna and the positions of the nine grahas in the sidereal zodiac. Each graha is judged by its sign, its house, the aspects it receives and its relation to the lord of the Lagna. The aspects are by sign: a graha casts its glance on the seventh house from itself, and Mars, Jupiter and Saturn also have special aspects.

To this static picture the tradition adds time. The Vimshottari dasha, 120 years in nine periods, is set by the Moon’s nakshatra at birth. It says which graha’s themes are active in which part of life, and sub-periods narrow it to months. A planet is read twice, once for what it promises in the chart and once for when its period comes.

The divisional charts (vargas) refine the picture. The Navamsa (D9) divides each sign into nine parts of 3°20′ and is read as the deeper layer of a chart and the key to marriage and character. The Daśamāṁśa (D10) is looked to for career. There are sixteen standard divisions in the Ṣoḍaśavarga scheme.

Parashari readings depend on the birth time. A few minutes can change the Navamsa and the divisional charts, and an hour can change the Lagna. They also depend on the ayanamsa. Different schools use different ones.

The tradition is clear that its statements describe tendencies, and that the timing of events is conditional on the choices people make. The texts themselves list remedies precisely because the outcome is not treated as fixed. There is no controlled evidence that dasha periods predict events, and a reader who presents them as certain is going beyond what the tradition itself claims.