Indian Astronomy and Astrology

Sushruta Samhita  is an ancient Sanskrit text on medicine and surgery written in the 6th century BC. It was written by Sushruta, widely considered in popular literature as the "father of Indian surgery". It is one of the two foundational Hindu texts on medical profession that have survived from ancient India.

Medieval Kerala had gained much progress in the field of knowledge. Sankaranarayanan was a famous astronomer during the reign of the Perumals. He has authored Sankaranarayaneeyam, a book on Astronomy. 

The Indian National Calendar (Saka calendar) is a lunisolar calendar, meaning it is based on both the moon and the sun.

Ancient Indian astronomers, most notably Aryabhata in the 5th century CE, scientifically explained that solar eclipses occur when the Moon passes between the Earth and the Sun, blocking the Sun's light. This replaced mythological explanations with mathematical and observational astronomy.

The binary system, which represents numbers using only two states (0 and 1), was conceptualized in ancient India by scholars like Pingala. This mathematical foundation is the core language used by modern computers to process and store data. Other electronic and mechanical devices do not rely on binary logic in the same fundamental way.

During the Gupta Golden Age, Indian astronomers like Aryabhata calculated the solar year and proved that the Earth is a sphere that rotates on its axis. This discovery occurred centuries before European scientists widely accepted the concept.

Jantar Mantar in Jaipur is a collection of nineteen architectural astronomical instruments built by the Rajput king Sawai Jai Singh II. UNESCO designated it a World Heritage Site, highlighting its significance as a masterpiece of astronomical innovation.

Aryabhatta, the famous ancient Indian mathematician and astronomer of the Gupta era, proposed that the Earth is spherical and rotates on its own axis. He also formulated the theory that the Earth revolves around the Sun, long before modern European astronomers. Other scholars like Nagarjuna worked in chemistry and metallurgy, while Charak and Sushrut focused on medicine and surgery.

Ancient Indian astronomers made remarkable discoveries, including the realization that the Earth is a sphere rotating on its axis and that the sun is a star. Inoculation is a medical technique, not an astronomical one, and they did not have the technology to measure other solar systems or precise interplanetary distances.

Ancient Indian astronomers made significant advancements, including calculating the length of the solar year and understanding the rotation of the Earth, which were highly sophisticated for their time.

Jain cosmology teaches that there are 24 Tirthankaras who appear in each half of the cosmic cycle to teach the path to liberation.

Nicolaus Copernicus proposed the heliocentric model, which placed the Sun at the center of the solar system, thereby overturning the long-held geocentric theory.

Yantra is a general term for a variety of ancient Indian astronomical instruments used to measure the position of celestial bodies. These instruments were often made of metal or wood and had various designs.

Quadrant is an ancient Indian astronomical instrument used to measure the altitude of celestial bodies. It is a quarter-circle with a graduated scale.

Surya Siddhanta is an ancient Indian astronomical text that contains the works of Surya Siddhanta. It is considered one of the most important texts in the history of Indian astronomy.