Jantar Mantar, constructed by Maharaja Jai Singh II in the 18th century, stands as a testament to ancient India's astronomical prowess. Its intricate instruments, such as the Samrat Yantra, accurately measure time and track celestial movements.

The Ujjain Observatory, established in the 5th century BCE, played a pivotal role in advancing astronomical knowledge in ancient India. Its location in Ujjain, Madhya Pradesh, was chosen for its favorable geographical position for celestial observations.

Aryabhata, a renowned astronomer and mathematician of the 5th century CE, made groundbreaking contributions to astronomy. His work on the concept of zero and his heliocentric model of the solar system were revolutionary for their time.

Astronomical observatories in ancient India were primarily used for observing celestial phenomena, such as the movement of stars, planets, and other heavenly bodies. This knowledge was crucial for understanding time, seasons, and celestial cycles.

Rani ki Vav, an intricately designed stepwell located in Gujarat, India, is renowned for its astronomical significance. Its architectural features, including alignments with celestial bodies, suggest its use as an astronomical observatory.

Stone was the primary material used in the construction of ancient Indian observatories. Its durability and resistance to weathering made it an ideal choice for structures intended to withstand the elements and serve as long-term observatories.

Jantar Mantar, a remarkable collection of astronomical instruments, was constructed by Maharaja Jai Singh II in the 18th century. Its various instruments, such as the Samrat Yantra and the Misra Yantra, were used for precise astronomical observations.

The Samrat Yantra, a large sundial found in ancient Indian observatories, was primarily used to measure the altitude of celestial bodies. Its design allowed astronomers to accurately determine the position of the Sun and other celestial objects.

Aryabhata, a renowned astronomer of the 5th century CE, proposed the revolutionary theory that the Earth rotates on its axis, challenging the prevailing geocentric model of the universe.

The astronomical observatory at Nalanda University served primarily as a teaching tool for students studying astronomy. It provided a platform for practical observations and hands-on learning of celestial phenomena.

Jantar Mantar, a UNESCO World Heritage Site, is located in the city of Jaipur, Rajasthan. It is a collection of 19 astronomical instruments built by Maharaja Jai Singh II in the 18th century.

The Misra Yantra, a complex instrument found in ancient Indian observatories, was primarily used to observe the movements of planets and other celestial bodies. Its design allowed astronomers to track the positions and trajectories of these objects.

Varahamihira, a renowned astronomer and astrologer of the 6th century CE, developed the concept of the zodiac and divided the ecliptic into 12 signs, laying the foundation for Indian astrology.

Astronomical observatories in ancient India were primarily used for observing celestial phenomena, such as the movement of stars, planets, and other heavenly bodies. This knowledge was crucial for understanding time, seasons, and celestial cycles.