Dashas
Antardasha (AD): The Sub-Period Within the Mahadasha
— If Mahadasha is the chapter, Antardasha is the scene within it — a shorter sub-period, ruled by a second planet, that decides which specific flavor of the chapter's theme you're actually living through right now.
Mahadasha (MD): The Major Planetary Period
— Mahadasha is the chapter title of a life story — years at a stretch governed by a single planet's nature, house and strength. Here's how to read what a chapter is really about before it's even fully written.
Pratyantardasha (PD): The Sub-Sub-Period for Precise Timing
— Mahadasha names the decade. Antardasha names the year. Pratyantardasha is where Vedic astrology gets specific enough to say: this particular stretch of weeks is when it's most likely to happen.
Vimshottari Dasha: Vedic Astrology's 120-Year Timing System
— A birth chart shows what you carry. A dasha shows when it comes due. Vimshottari Dasha is the 120-year clock that Vedic astrology lays over every horoscope to answer the question a static chart never can: why now?