Varahamihir’s book “panch siddhanta”, noted that the moon and planets are lustrous not because of their own light but due to sunlight. In the “Brihad Samhita” and “Brihad Jatak”, he has revealed his discoveries in the domains of geography, constellation, science, botany and animal science. In his treatise on botanical science, Varahamihir presents cures for various diseases afflicting plants and trees.