Pandit Samanta Chandra Sekhar Harichandan Mohapatra, locally known as "Pathani Samanta",was the illustrious author of "Siddhanta Darpan"-
a systematic record of his life-long relentless work composed in beautiful metrical Sanskrit verses . "Siddhanta Darpan" is an astronomical treatise in elegant Sanskrit verses, developed and improved upon the 'Surya-Siddhanta' and the 'Siddhanta-Siromani' of the past. This magnum opus of Chandra Sekhar, the last and best book that worth to its name is really a mirror of India's astronomical knowledge. A Hindu orthodox by nature, Chandra Sekhar, with his traditional background alone studied the subject of astronomy, observed the movements of planets through
naked eyes and was able to reach the approximate reality as founded by scientists with the aid of modern equipments. He was an outstanding
mathematician of high order and engaged himself in the field of mathematical calculations known as 'astronomy'. In 'Siddhanta Darpan' poetry and mathematics are in tune with each other which stands as a specimen of his genius. By sheer efforts and perseverance, this last and foremost orthodox Hindu Siddhanta writer could rise above his environment and left an indelible stamp of his genius on the history of Indian astronomy. His ability in the preparation of "Manayantra" (measuring instrument), "Golyantra" (spherical instrument) and "Surya-Ghadi" (Sun dial to measure the time) proved him to be a good architect with engineering skill. He had also interest in the preparation of fire works with knowledge to launch the same to a particular height. India is a nation of ancient culture and tradition. It reached the zenith in all spheres at one time when most of the so called advanced nations of to-day were not discovered. Indian astronomy is nearly as old as the
Vedas. As a science, it rose to its peak in the days of Aryabhatta in the 5th century A.D. Indian astronomy of the Hindus is a mere curiosity to the scholars of West, because they know very little about our traditional mathematical astronomy as that does not come under the mainstream of astronomy which originated in Babylonia and evolved through the Greeks and Europeans.