koṭyaḥ syuḥ pañca-viṁśatiḥ

anda-madhya-gatah-situated in the center of the universe; suryah-the sun globe; dyav-abhumyoh-the two planetary systems Bhurloka and Bhuvarloka; yat-which; antaram-in between; surya-of the sun; anda-golayoh-and the globe of the universe; madhye-in the middle; kotyah-groups of ten million; syuh-are; panca-vimsatih-twenty-five.