Sade Sati, a significant astrological period in Vedic astrology, refers to the 7.5 years during which the planet Saturn (Shani) transits through the 12th, 1st, and 2nd houses from an individual's natal Moon. This period is divided into three phases, each lasting approximately 2.5 years. Sade Sati is often associated with challenges and hardships, but it also offers opportunities for growth and transformation.

In astrology, the transit of planets refers to the movement of planets through the zodiac signs and how these movements influence individual horoscopes. Each planet moves at its own pace and has distinct impacts depending on the zodiac sign it is transiting through and the natal chart (birth horoscope) of an individual.