Varahamihira, a renowned astronomer and mathematician, is widely recognized for his contributions to Vastu Shastra, the ancient Indian science of architecture and urban planning.

Vastu Shastra emphasizes the importance of aligning buildings and structures with the natural elements, such as the sun, wind, and water, to create harmonious and balanced living spaces.

Vastu Shastra encompasses various principles, including orientation of buildings based on cardinal directions, selection of appropriate materials and colors, and incorporation of water bodies, to create harmonious and sustainable living environments.

Ancient Indian astronomers used their knowledge of astronomy to determine the most auspicious locations for settlements, considering factors such as the position of the sun, wind patterns, and water availability.

Ancient Indian astronomers aligned temples with celestial bodies, such as the sun and stars, to create a connection between the earthly and heavenly realms.

The Konark Sun Temple in Odisha, India, is an iconic example of the integration of astronomy and architecture. The temple's design incorporates astronomical features, such as the alignment of its main axis with the sunrise on the summer solstice.

Ancient Indian astronomers made significant contributions to the development of calendars by observing the movement of the sun and moon, studying the patterns of stars, and calculating the length of the year.

The Hindu calendar, also known as the Panchang, is an ancient Indian calendar that is still widely used in India and other parts of South Asia for religious and cultural purposes.

In ancient Indian astronomy, the Nakshatras are 27 lunar mansions associated with specific deities and used for astrological purposes, such as determining the auspiciousness of events.

Ancient Indian astronomers used their knowledge of astronomy to predict eclipses by observing the movement of the sun and moon, studying the patterns of stars, and calculating the Earth's orbit.

Aryabhata, a renowned ancient Indian astronomer and mathematician, is credited with accurately predicting a solar eclipse in 556 CE.

Jantar Mantar was primarily used to determine the time of day, as well as to study the movement of the sun, moon, and stars.

The quadrant was an astronomical instrument used in ancient India to measure the altitude of celestial bodies, such as the sun and stars.

Ancient Indian astronomy contributed to the development of mathematics by providing a basis for trigonometry, leading to the discovery of new mathematical concepts, and inspiring the development of calculus.

Ancient Indian astronomy left a lasting legacy in modern science by laying the foundation for modern astronomy, influencing the development of scientific instruments, and contributing to the understanding of the universe.