In how many days do the planets change their zodiac signs?, Timings of planetary transits, What is Transit?. Planetary Transits Time: The change of zodiac sign of planets is a natural phenomenon and from time to time every planet keeps changing its zodiac sign. Due to this, the transit horoscope keeps changing, changes keep happening in personal life, weather and work life. There are a total of 9 planets and these are Sun, Moon, Mars, Mercury, Jupiter, Venus, Saturn, Rahu and Ketu. There are 12 zodiac signs which are - Aries, Taurus, Gemini, Cancer, Leo, Virgo, Libra, Scorpio, Sagittarius, Capricorn, Aquarius and Pisces. 9 planets are constantly moving and rotating, that is why their zodiac sign keeps changing from time to time, due to which there is an effect on personal life and weather. The change of zodiac sign of planets is called TRANSIT. In how many days do the planets change their zodiac signs? Watch Video here Let us know which planet changes its zodiac sign and when? Th