The circular shape alone is a symbol of the never ending circle of life. Placing a half moon and half sun inside the circle supplies even more meaning. The sun is often recognized as a symbol of rebirth, strength and power. The moon is associated with the female in many cultures often in the form of a goddess.
Also question is, what does a half moon tattoo symbolize?
Crescent moons (also called half moons) near-universally represent birth cycles and fertility, and may be worn to represent womanhood. If you appreciate more light-hearted things, you may find a man on the moon tattoo to be a cute and whimsical choice.
Also, what does matching sun and moon tattoo mean?
Together the Sun and the Moon represents Wholeness, Balance and Harmony. Sun represents masculinity and the Moon is the symbol of feminine energy. The Sun and Moon together resembles a divine unity of two opposites energies that complement each other.