Moon

The planetary ruler of Cancer, the Moon is all about emotions, you inner self and instincts.

The light of the night, the Moon, is concerned about the unconscious and our moods. It is also about family issues, roots and homes. 

In mythology the goddess moon is associated with Mothers.  Therefore, as a feminine force, it is about mothers, wives, and even fertility.

It takes the Moon 28 days to travel through all the signs of the zodiac, and spends about 2.5 days in each sign.