Lagadha developed a system of planetary periods called the Grahachakra. This system was used to calculate the positions of the planets at any given time.

Lagadha used geometry to calculate eclipses. He developed a method for determining the position of the Moon and the Sun at the time of an eclipse.

Lagadha created a zodiac that was based on the positions of the stars. This zodiac was used to predict the movement of the planets and the occurrence of eclipses.

Lagadha's contributions to astronomy helped to advance the field of astronomy. His work on planetary periods, eclipses, and the zodiac provided a foundation for future astronomers to build upon.

Lagadha lived in the 2nd century BCE.

Lagadha's astronomical observations were recorded in the book Surya Siddhanta.

Lagadha used the Ujjain Observatory to make his astronomical observations.

Lagadha's work was patronized by the king Chandragupta Maurya.

Lagadha lived in the city of Ujjain.

Lagadha studied at Takshashila University.

Lagadha used an armillary sphere to measure the positions of the stars.

Lagadha used a geometric method to calculate the time of an eclipse.

Lagadha used a trigonometric method to calculate the position of the planets.

Lagadha used a geometric method to calculate the distance between the Earth and the Moon.

Lagadha used a geometric method to calculate the size of the Earth.