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By Astrologer Praveen Kumar · 24 July 2026 · Updated 3 October 2026
Aryabhata and Pataliputra belong together in the story of Indian science. Around 499 CE, in Kusumapura — widely identified with Pataliputra, the ancient city that is now Patna — the astronomer Aryabhata composed the Aryabhatiya, one of the most influential works in the history of Indian mathematics and astronomy. For anyone in Patna who reads a Panchang, checks a kundli or watches a grahan, this heritage is close to home. This post explains who Aryabhata was, what he actually contributed, the Patna places linked with his name, and how Jyotish grew out of this astronomical tradition.
Quick answer: Aryabhata wrote the Aryabhatiya in 499 CE and associated his work with Kusumapura, identified with Pataliputra (Patna). He proposed that the Earth rotates on its axis, used a place-value system, gave pi as about 3.1416, and explained eclipses through the shadows of the Earth and Moon. His mathematical approach became the foundation of ganita Jyotish, on which every kundli and Panchang still depends.
| Topic | What is well established |
|---|---|
| Main work | Aryabhatiya (आर्यभटीय), about 121 verses in four sections |
| Date | 499 CE, when Aryabhata says he was 23 years old |
| Place associated | Kusumapura, widely identified with Pataliputra, ancient Patna |
| Earth's motion | Proposed that the Earth rotates on its axis, causing the daily motion of the stars |
| Number system | Used a place-value system in his calculations |
| Pi | Gave a value equal to about 3.1416 and called it approximate |
| Eclipses | Explained solar and lunar eclipses by the Moon and the Earth's shadow |
| Trigonometry | Gave a table of sine differences (jya) |
| Legacy in Patna | Aryabhatta Knowledge University; Taregna tradition in Masaurhi |
| Wider legacy | India's first satellite, launched in 1975, was named Aryabhata |
Pataliputra (पाटलिपुत्र) was the capital of the Magadha empire under the Mauryas and later an important centre under the Guptas. Kusumapura, "the city of flowers", is an old name associated with it. In the Aryabhatiya, Aryabhata says he presents the knowledge honoured at Kusumapura. Historians still debate where exactly he was born, but his scientific work is firmly tied to this city, and Patna rightly counts him among its greatest names.
Patna's long history as a seat of learning — alongside nearby Nalanda, whose ancient university drew scholars from across Asia — gave the region a strong tradition of study in grammar, philosophy, mathematics and astronomy. For an astrologer working in Patna today, this is not just history; it is the root of the discipline.
The Aryabhatiya is compact and written in verse. Its four sections (padas) are:
Aryabhata proposed that the apparent daily westward movement of the stars is caused by the Earth turning on its axis. He compared it to a person in a moving boat who sees the stationary shore moving backwards. This was a bold idea, and many later Indian astronomers did not accept it.
His calculations rely on a place-value system, and his verses describe methods for square roots and cube roots that only work with place value. This mathematical style shaped later Indian astronomy.
Aryabhata gave a rule that works out to 62832 divided by 20000, which equals 3.1416, and described the value as approximate (asanna). This is a remarkably close value for his time.
In the Golapada, Aryabhata explained that a solar eclipse occurs when the Moon covers the Sun, and a lunar eclipse when the Moon enters the Earth's shadow. He also gave methods for calculating eclipses. This was an astronomical explanation rather than the mythological one of Rahu swallowing the Sun or Moon.
He gave a table of sine differences used to compute planetary positions — a key tool in Indian astronomy for centuries.
In Jyotish, Rahu and Ketu are called chhaya grahas — shadow planets. Astronomically, they correspond to the lunar nodes: the two points where the Moon's path crosses the Sun's apparent path. Eclipses happen only when the Sun and Moon are near these nodes. So the astronomy of Aryabhata and the symbolism of Jyotish meet: the Puranic story of Rahu and Ketu gives meaning, while the mathematics of the nodes gives timing. Our post on Rahu and Ketu in the kundali explains how these points are read, and grahan dosh remedies covers eclipse-related combinations in a birth chart.
Classical Jyotish is described as having three branches (skandhas):
Phalita cannot exist without ganita. Before any astrologer can say that Saturn is in a certain house or that a person is in a Jupiter dasha, the exact longitude of each planet must be calculated for the moment and place of birth. The Panchang — tithi, nakshatra, yoga, karana and vara — is also a product of ganita. Our guide on 27 nakshatras and the post on Mithila Panchang tradition show how deeply this calculation tradition still runs in Bihar.
Aryabhata's work generated a strong commentary tradition. Bhaskara I wrote an important commentary on the Aryabhatiya in the 7th century. Brahmagupta, though critical of some of his ideas, engaged closely with them. Over centuries, Aryabhata's methods were used and refined, especially in South India, where the Aryabhatiya school of calculation remained influential.
The Government of Bihar established Aryabhatta Knowledge University in Patna in 2008, naming it after the astronomer. It serves as an affiliating university for professional and technical colleges in the state. Its name is a public reminder that Patna regards Aryabhata as its own scholar.
Taregna (तारेगना) lies near Masaurhi in Patna district, south of the city. Local tradition links it with Aryabhata, and the name is popularly explained as connected with counting the stars (tare gina). This link is a tradition rather than a documented historical fact, but it is cherished locally.
Taregna came to national attention during the total solar eclipse of 22 July 2009, when it was widely promoted as one of the best viewing locations in India. Many scientists, students and visitors gathered there, though cloudy monsoon skies limited the view. The event revived public interest in Bihar's astronomical heritage.
Every reliable kundli is first a calculation. If your time of birth is wrong by even a few minutes, the lagna and divisional charts can shift. This is why a careful astrologer in the Aryabhata tradition of Patna begins with accurate ganita — correct time, correct place, correct ayanamsha — before any phalita reading.
In a Patna kundali reading, Astrologer Praveen Kumar first verifies your chart calculation and then reads the houses, yogas and dashas. Bring your date of birth, exact time of birth and place of birth. You can book a Vedic astrology consultation or a detailed kundali analysis, in person for a consultation in Patna or online from anywhere in Bihar. For the difference between Moon and Sun signs, read Moon sign vs Sun sign in Vedic astrology.
Book your consultation with Astrologer Praveen Kumar — Contact us today
Aryabhata states in the Aryabhatiya that he set out the knowledge honoured at Kusumapura, and Kusumapura is widely identified with Pataliputra, ancient Patna. His exact birthplace is debated by historians, but his work is firmly associated with Kusumapura. This is why Patna regards him as its own and named its knowledge university after him.
The Aryabhatiya is dated to 499 CE. In the text Aryabhata says that he was 23 years old when 3,600 years of the Kali Yuga had passed, which corresponds to 499 CE and places his birth around 476 CE. It is a short text of about 121 verses in four sections.
Taregna, near Masaurhi in Patna district, is linked by local tradition with Aryabhata, and its name is popularly explained as relating to counting the stars. The connection is a tradition rather than a documented fact. Taregna drew national attention as a viewing site for the total solar eclipse of 22 July 2009.
Ganita Jyotish is the mathematical and astronomical part: calculating planetary positions, eclipses, tithis and the calendar. Phalita Jyotish is the interpretive part that reads these positions for life events, such as kundali reading and muhurat. Every kundli and Panchang today depends on ganita for its accuracy before any phalita reading begins.
The Aryabhatiya is a work of mathematics and astronomy, not of predictive astrology, so it says little about phalita. It gave an astronomical explanation of eclipses and planetary motion. Later Jyotish scholars used such siddhanta calculations as the base for horoscopy, so his work fed astrology indirectly through accurate computation.
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