He was one of the nine gems in the court of King Vikramaditya. He was a great astronomer and astrologer. He lived during 500 BC. His works are Panchasiddant (on astrology), Brihad Samhita and Brihad Jatak.

Contributions

Planets and moon are lustrous not because of their own light.

Treatise on geography, constellation, science, botany & animal science.

In botanical science he prescribes various cures for diseases afflicting plants and trees