The Rigveda, one of the four Vedas, contains hymns and verses that mention astronomical observations and celestial bodies.

Astronomy was primarily used to determine auspicious times for religious ceremonies, festivals, and rituals.

The Moon was considered the most important celestial body due to its influence on tides, agriculture, and religious ceremonies.

The lunar mansions were used for timekeeping, associated with deities, and used for astrological predictions.

Lagadha, an ancient Indian astronomer, is credited with developing the concept of the zodiac and dividing it into 12 signs.

The Jyotisha Vedanga was primarily used to determine auspicious times for religious rituals and ceremonies.

Aryabhata, a renowned ancient Indian astronomer, proposed the heliocentric model of the solar system, where the Earth revolves around the Sun.

The astrolabe was primarily used for astrological predictions and determining the positions of celestial bodies.

Bhaskara II, a prominent ancient Indian astronomer, developed the concept of the precession of the equinoxes, which is the gradual shift in the position of the equinoxes.

The Surya Siddhanta was primarily used to calculate the positions of celestial bodies and predict their movements.

Varāhamihira, a renowned ancient Indian astronomer, is credited with developing the concept of the nine planets (navagrahas) and their influence on human lives.

The armillary sphere was primarily used for astrological predictions and determining the positions of celestial bodies.

Aryabhata, a renowned ancient Indian astronomer, developed the concept of the Earth's rotation on its axis, which was a significant advancement in astronomical understanding.

The calendar in ancient India served multiple purposes, including determining auspicious times for rituals, predicting eclipses and other celestial events, and studying the movement of planets.

Aryabhata, a renowned ancient Indian astronomer, developed the concept of the Earth's revolution around the Sun, which was a significant advancement in astronomical understanding.