परम्पराParamparā
Jyotiṣa is called the eye of the Veda — the limb that lets the other five see when to act. It began as a calendar for the rite, became a mathematics of the sky, took the horoscope into itself and made it Indian, and was carried for two and a half thousand years from teacher to student, mostly by memory. This is that line, era by era, and where Sutram stands on it.
Vedic rootsवेद
The nakshatras are already named in the Ṛgveda and the Taittirīya Saṁhitā; the Moon's monthly walk through them is the oldest instrument in the system. Jyotiṣa at this stage is a science of the rite: when to lay the fire, when the year turns. No horoscopes yet — but the sky is already being read as meaning, not only as clock.
Vedāṅga Jyotiṣa of Lagadhaवेदाङ्ग ज्योतिष
The first text devoted to the subject: a compact set of verses for computing tithi, nakshatra and the solstices for the five-year yuga. Its internal astronomy points to a very old date; the text as we have it was fixed later. It is one of the six Vedāṅgas — the disciplines that serve the Veda — and the reason Jyotiṣa is counted among them.
The Siddhāntas and the horoscopeसिद्धान्त
Two things happen at once. Indian astronomers build the siddhānta tradition — full computational models of the sky — culminating in Āryabhaṭa (b. 476 CE) and the received Sūrya Siddhānta. And horoscopy arrives: the Yavanajātaka (c. 2nd–3rd century CE) carries Hellenistic natal astrology into Sanskrit, where it is absorbed, reorganised around the Moon and the nakshatras, and given the daśā — the thing the Greeks never had. Garga and the early saṁhitā authors work the omen literature in parallel.
Parāśara and Jaiminiपराशर · जैमिनि
The Bṛhat Parāśara Horā Śāstra, attributed to the sage Parāśara, is the charter of what most people mean by Vedic astrology: lordship, functional benefics by lagna, the vargas, the yogas, and Vimśottarī daśā — the 120-year clock keyed to the Moon's nakshatra. The received text is a medieval compilation, but the system it codifies is the mainstream to this day and the one Sutram's engine runs. The Jaimini Sūtras, terse and aphoristic, describe a different object of study — chara kārakas, sign aspects, ārūḍhas — and are read alongside, not against.
Varāhamihiraवराहमिहिर
The great synthesiser. Bṛhat Jātaka set the horoscope in a form every later author answers to; Bṛhat Saṁhitā gathered omens, weather, gems, architecture and the nakshatra groups — the mṛdu, tīkṣṇa, cara and dhruva classes we still cite — into one encyclopaedia; Pañcasiddhāntikā compared the five astronomical schools of his day. His son Pṛthuyaśas wrote the Ṣaṭpañcāśikā, one of the earliest praśna (horary) manuals.
The commentatorsटीका
A living tradition explains itself. Kalyāṇavarman's Sārāvalī (c. 800) expands Varāhamihira into a teaching text. Bhaṭṭotpala's commentaries (dated 966 CE) preserve quotations from dozens of works otherwise lost. Śrīpati writes the Jyotiṣa Ratnamālā; Bhāskara II's Siddhānta Śiromaṇi (1150) is the summit of the mathematical side. The ṭīkā — the line-by-line commentary — is how the tradition argued with itself and corrected itself.
The great manualsफलदीपिका
The period that produced the books most students still read first. Vaidyanātha Dīkṣita's Jātaka Pārijāta; Mantreśvara's Phaladīpikā, the clearest classical statement of results by house and planet; Veṅkateśa's Sarvārtha Cintāmaṇi; the Uttara Kālāmṛta. In 1587 Nīlakaṇṭha's Tājika Nīlakaṇṭhī brought the Perso-Arabic annual chart — the varṣaphala — fully into Sanskrit as Tājika. In Kerala the Praśna Mārga (1649) made horary a complete discipline.
Nāḍī and Bhṛguनाडी · भृगु
Alongside the classical line run the pre-written traditions: the Bhṛgu Saṁhitā and the Nāḍī granthas — palm-leaf collections, largely in Tamil and Sanskrit, indexed by the ascendant degree or the thumbprint, each leaf a life. The Candra Kalā Nāḍī (Deva Keralam) is the best known. They are read by lineage-holders, not learned from books, and they remind the classical astrologer how much of the tradition was never meant to be systematic.
The modern revivalआधुनिक
B. Suryanarain Rao founded The Astrological Magazine in 1895; his grandson B. V. Raman (1912–1998) made Jyotiṣa legible to a modern reader and to the world. K. S. Krishnamurti built KP — a sub-lord system for timed yes/no answers. Pandit Roop Chand Joshi's Lāl Kitāb (1939–1952) offered a household ledger of debt and remedy. K. N. Rao and the Bhāratīya Vidyā Bhavan classes trained a generation in research method. And then the computer: exact ephemerides for everyone, which changed the question from how to calculate to how to know if you were right.
Sutram — grading in publicसूत्रम्
Sutram sits in the Parāśarī mainstream: lordship first, dignity, Vimśottarī, gochara. What it adds is a discipline the classical texts assumed and modern practice mostly dropped — a rule bank where every rule is written down, and The Window, where one dated call is made each week and marked the week after, hit or miss, in public. The Sangha is where that gets learned: by reading charts together, and by being corrected in the wiki.
How it was carried
Guru to śiṣya, by ear. The sūtras were memorised before they were understood; the commentaries were how understanding was checked. A student did not own a text — a student owned a teacher's reading of a text, and the duty to pass it on unbroken. That chain is the paramparā. Sutram's version is small and modern: a teacher who grades his own calls, a wiki that records the corrections, and a Sangha that asks before it asserts.
