Jupiter through the Signs and Houses Jupiter is the "Great Benefic", bringer of good luck, opportunities, fortune, growth, and expansion, ruler of the sign of Sagittarius. Its presence makes the sign and house it is passing through BIGGER, FULLER, MORE EXPANDED. It bring BREADTH wherever it goes. Jupiter is literally "full of hot air". This energy can fuel big dreams and ignite hope and understanding on a massive level, it can also burn itself out with exaggerated excess.