अथ च यावतार्धेन नभोवीथ्यां प्रचरति तं कालमयनमाचक्षते ॥ ६ ॥
atha ca yavatardhena nabho-vithyam pracarati tam kalam ayanam acaksate.
- atha
- now
- ca
- also
- yavata
- by as long as
- ardhena
- half
- nabhah-vithyam
- in outer space
- pracarati
- the sun moves
- tam
- that
- kalam
- time
- ayanam
- ayana
- acaksate
- is said.
Thus the time the sun takes to rotate through half of outer space is called an ayana, or its period of movement (in the north or in the south).