Lagadha, an astronomer from the 1st century BCE, is believed to have made the first recorded observation of a solar eclipse in India.

In Indian astronomy, 'grahas' refers to planets, celestial bodies that move relative to the fixed stars.

Nilakantha Somayaji, a 15th-century astronomer, proposed the idea of an elliptical orbit for planets, centuries before Kepler's formulation of elliptical orbits.

The 'Surya Siddhanta' is a Sanskrit astronomical text that primarily focuses on solar astronomy, including the motion of the Sun, eclipses, and planetary positions.

Brahmagupta, a 7th-century astronomer, developed a method for calculating the distance to the Moon using the lunar parallax method.

The 'Nakshatras' in Indian astronomy refer to constellations, specific regions of the sky used for astrological and calendrical purposes.

Aryabhata, in the 5th century CE, proposed a heliocentric model of the solar system, where the Earth and other planets revolve around the Sun.

The 'Panchang' is an almanac that provides astronomical information such as planetary positions, auspicious dates, and festival timings.

Brahmagupta developed a method for calculating the time of sunrise and sunset using trigonometric functions.

The 'Jyotisha Vedanga' is an ancient Indian text that deals with astronomy, specifically the calculation of planetary positions and eclipses.

Aryabhata proposed the idea of a rotating Earth, which was a significant departure from the prevailing geocentric model of the time.

The 'Brihat Samhita' is an ancient Indian text that focuses on astrology, providing insights into planetary influences and predictions.

Aryabhata developed a method for calculating the circumference of the Earth using trigonometric functions.

The 'Lilavati' is an ancient Indian text that deals with mathematics, specifically arithmetic and geometry.

Aryabhata proposed the idea of a spherical Earth, which was a significant departure from the prevailing flat Earth model of the time.