NMM has taken up a project for publishing rare and unpublished manuscripts in three forms: (a) facsimile, (b) critical edition with annotation, and (c) critical edition with translation. This series has been named "Prakašikā".
This book 'Siddhantasundarah' an astronomical text is getting published by the Mission, under its Prakashika series along with explanation in English.
For technical questions relating to this book, readers may contact the scholar directly through mail-Somenath 79093@gmail.com A master of arts in Sanskrit with special paper on Epigraphy from the University of Burdwan, Dr. Jagatpati Sarkar received his Ph.D from Jadavpur University, Kolkata. He has also specialized in Library and Information Science from the Rabindrabharti University, Kolkata. He is presently working in the Asiatic Society, Kolkata. Dr. Sarkar has edited some books on Manuscriptology and has published a number of articles in the leading journals of India. He is also associated with the Rabindrabharti University as a Guest Faculty in the Department of Library and Information Science. Foreword The knowledge of Astronomy in ancient India had reached to a remarkable height by Aryabhat, Bhaskara-1, Brahmagupta, Bhaskarācārya, Jñanaraja and many others. Vedanga Jyotisa (1370) B.C.) is considered to be the first astronomical text where we found five-year Yuga system. This Yuga-system was continued to be fol lowed till Paitāmahasiddhänta (80 C.E). After Paitāmahasiddhänta, Indian astronomy had started taking turn into a new Era. In the old Süryasiddhänta (200 C.E.), the drastic change is noticeable - (i) five-year Yuga-system was no longer followed (ii) mathematical astronomy was linked with observational astronomy. Eventually, mathematical astronomy got prominence in Aryabhatyam (499 A.D.). The primary source materials of ancient astronomy were coined in Sanskrit Language whereas medieval source materials are taken from Arabic and Persian manuscripts. The present publication Siddhäntasundará (1503 A.D.) is a later astronomical work composed by Jñanaraja, who followed Brahmasiddhäntah in Šakalyamsahitä. Indian astronomical works are divided into different schools like brahmapakşa, äryapaksa, ardharātrikāpakṣa and saurapakşa. Siddhantasundarah belongs to the last category. The text has two major sections-(i) grahaganitädhyāya (ii) goladhyāya. Grahaganitädhyaya focuses on mathematical aspect of astronomy and Goladhyaya deals with cosmology and allied matters. Here, he explained cosmology related myths found in the Puranas. Introduction Siddhantasundarah is a significant work of Jñanarāja, son of great scholar Näganätha, containing all the previous knowledge of astronomy. The epochal positions which Jñanaraja has given in his work, Siddhantasundara, are true for saka 1425 or 1503 CE. This was evidently his date. Jnanaraja has written the astronomical book having two main parts Goladhyaya and Ganitädhyāya. Verses which are found in different manuscripts are different in number like mad chapter etc. Chintamani, the son of Jnanraja, made a commentary on his book in detail and that commentary is available. The Siddhantasundarah follows Brahmasiddhäntah in Sakalyasamhita which follows the Süryasiddhänta. It gives the epochal positions of planets and annual rates of motion for finding the places of different planets. These positions and the rate of yearly motion of planets, completely follow the modern Süryasiddhänta. The compiler explained an important term "ayanamśa' as the difference between the sun's position calculated from the shadow cast by the noon sun and that obtained from calculation based on a Karana work". Siddhantasundarah is a work having explanations of theory in different view from Bhaskarācharya. The yantramālā chapter describes one new instrument. Vedanga Jyotisa is the first astronomical work compiled by Lagadha in 14th century BCE. But we get instances of the astronomical knowledge in Vedic texts and Purānas. **Contents and Sample Pages**
A master of arts in Sanskrit with special paper on Epigraphy from the University of Burdwan, Dr. Jagatpati Sarkar received his Ph.D from Jadavpur University, Kolkata. He has also specialized in Library and Information Science from the Rabindrabharti University, Kolkata. He is presently working in the Asiatic Society, Kolkata. Dr. Sarkar has edited some books on Manuscriptology and has published a number of articles in the leading journals of India. He is also associated with the Rabindrabharti University as a Guest Faculty in the Department of Library and Information Science.
The present publication Siddhäntasundará (1503 A.D.) is a later astronomical work composed by Jñanaraja, who followed Brahmasiddhäntah in Šakalyamsahitä. Indian astronomical works are divided into different schools like brahmapakşa, äryapaksa, ardharātrikāpakṣa and saurapakşa. Siddhantasundarah belongs to the last category. The text has two major sections-(i) grahaganitädhyāya (ii) goladhyāya. Grahaganitädhyaya focuses on mathematical aspect of astronomy and Goladhyaya deals with cosmology and allied matters. Here, he explained cosmology related myths found in the Puranas.
The Siddhantasundarah follows Brahmasiddhäntah in Sakalyasamhita which follows the Süryasiddhänta. It gives the epochal positions of planets and annual rates of motion for finding the places of different planets. These positions and the rate of yearly motion of planets, completely follow the modern Süryasiddhänta. The compiler explained an important term "ayanamśa' as the difference between the sun's position calculated from the shadow cast by the noon sun and that obtained from calculation based on a Karana work".
Siddhantasundarah is a work having explanations of theory in different view from Bhaskarācharya. The yantramālā chapter describes one new instrument. Vedanga Jyotisa is the first astronomical work compiled by Lagadha in 14th century BCE. But we get instances of the astronomical knowledge in Vedic texts and Purānas.
**Contents and Sample Pages**
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