Shani Yantra should be installed and worshipped in order to appease planet Saturn. As per Ancient Vedic Texts, Saturn is a merciless planet. Saturn is the Lord of Zodiac sign Capricorn and Aquarius in Astrological terms. It is Exalted in zodiac sign Libra and Debilitated in zodiac sign Aries. It is said that planet Saturn acts as a judge for our past deeds. The planet Saturn is a natural grantor of jobs and services, metals, industries, age, poverty, hardships, diseases, all kinds of obstacles and selfishness.