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Surya Prajnapti Sutra (c. 3rd–4th century BCE) is a highly revered text in Jainism. The teaching and principles contained in it is followed by the Shwetambar sect. It is also known as Surya Pannti. This text is a part of the Jain canonical literature called Upang Agams, which provides explanation to the thoughts exerted by the primary text called Agam Sutras. It has Surya Prajnapti Sutra deals with the heavenly bodies like the sun and planets. It contains a detailed description of each of these celestial objects. There is also a comprehensive approach to the mathematics involved in calculating the motions of the planets and the sun. It classifies all numbers into three sets: enumerable, innumerable and infinite. It recognises five different types of infinity: infinite in one and two directions, infinite in area, infinite everywhere, and infinite perpetually. It measures the length of the lunar month (the orbital period of the Moon around the Earth) as 29.5161290 days, which is only 20 minutes longer than the modern measurement of 29.5305888 days.