Knowledge base
Jyotisha Library
Plain-language guides to the eight Jyotisha schools and the classical treatises Astravya cites, each with its own glossary, working rules and how it differs from the others.
Interpretive schools
Each school reads a chart with a different grammar. Astravya works mainly in Parashari and states plainly whenever a reading comes from another system.
Parashari
पराशरीThe mainstream house-and-lordship system most Vedic charts are read with.
24 published rules · 7 treatises
Read the guideJaimini
जैमिनिA sign-based system with degree-ranked karakas and Chara dashas.
1 published rules · 1 treatises
Read the guideTajika
ताजिकAnnual solar-return charts using Perso-Arabic aspect doctrine.
0 published rules · 1 treatises
Read the guidePrashna
प्रश्नHorary astrology: the chart of the moment a question is asked.
0 published rules · 1 treatises
Read the guideMuhurta
मुहूर्तElectional astrology: choosing a favourable time to begin something.
0 published rules · 1 treatises
Read the guideSamhita
संहिताMundane astrology: weather, harvests, collective events and omens.
0 published rules · 1 treatises
Read the guideSiddhanta
सिद्धान्तThe computational tradition: how planetary positions are actually derived.
0 published rules · 2 treatises
Read the guideNadi
नाडीLineage-held manuscript traditions with fine chart subdivisions.
0 published rules · 0 treatises
Read the guideClassical treatises
The sources our published rules are drawn from, with what each one is best used for.
Brihat Parashara Hora Shastra
बृहत् पराशर होरा शास्त्र
The foundational reference for house, lordship, divisional and dasha technique.
Brihat Jataka
बृहज्जातक
A compact, disciplined natal manual valued for its precision.
Saravali
सारावली
A detailed expansion of natal combinations and their described results.
Phaladeepika
फलदीपिका
A well-organised practical guide widely used for house-based judgement.
Jataka Parijata
जातक पारिजात
An encyclopaedic compilation drawing many earlier authorities together.
Uttara Kalamrita
उत्तर कालामृत
Concentrated material on significations, karakas and sensitive points.
Hora Sara
होरासार
An early natal work valued for its treatment of timing and results.
Jaimini Sutras
जैमिनि सूत्र
The sutra source for karakas, Arudha padas, sign aspects and Chara dashas.
Brihat Samhita
बृहत् संहिता
The great compendium of mundane astrology, omens and applied sciences.
Muhurta Chintamani
मुहूर्त चिन्तामणि
The standard reference for choosing auspicious times.
Prashna Marga
प्रश्न मार्ग
The comprehensive Kerala treatise on horary judgement.
Tajika Neelakanthi
ताजिक नीलकण्ठी
The standard Indian handbook for annual solar-return charts.
Surya Siddhanta
सूर्य सिद्धान्त
A classical astronomical treatise defining planetary computation.
Pancha-Siddhantika
पञ्चसिद्धान्तिका
A comparative summary of five earlier astronomical systems.
Every summary on these pages is Astravya's own wording of a classical principle. Sanskrit verses are not reproduced unless the source wording is out of copyright or licensed, and each published rule records its chapter, verse and rights basis.