Jupiter rules our moral beliefs and shows the areas of our lives for expansive growth. As the largest of all the planets, Jupiter transits magnify based on the Zodiac sign it is in. Jupiter rules Sagittarius and is in its’ detriment in Gemini. Jupiter in Cancer is exalted and in Capricorn is in its’ fall. Jupiter enters a new sign about once a year and takes almost 12 years to travel through the Zodiac Signs. Jupiter Retrograde occurs once a year for about 4 months.