There is a certain method in Vedic astrology to discover the Mahadasha interval. In line with it, 3 Nakshatras are proportioned out to every World, which makes the number of Nakshatras rely to 27 for many of the 9 planets. So, the Mahadasha of any planet depends on the position https://www.youtube.com/shorts/oUsNAkX7h9w