According to the Rigveda Jupiter is worth worshipping for the whole world. If he becomes pleased with his devotees he blesses them with prosperity and intelligence. He helps his devotees to be on a virtuous paths and protect them in every calamity. Jupiter is very affectionate towards people who seek his refuge. His ‘great phase lasts till sixteen years. Fast should be observed on dark moon (Amavasya) and on Thursday for his pacification.
Guru Yantra should be established for worship of Lord Jupiter for blessings in prosperity, power, rank, authority, abundance, wealth, business and for strengthening a weak Jupiter in the horoscope with pooja and mantra.