Jupiter is the planet that popular astrology recognizes as the planet of fortune. It spends about a year in each sign and therefore takes about 12 years to complete a circuit of the zodiac. This means that having Jupiter in your sign for a year is not a frequent occurrence, and when it happens, we should make the most of these expansive energies. On May 25, Jupiter completes its journey through Taurus and makes its regal entrance into mercurial Gemini.