The earth orbits the sun and the moon orbits the earth, and as a result, the same half of the moon is facing the earth constantly with the viewed position creating the lunar phase that earth witnesses. The earth gets to view different illuminated portions of the moon at different phases and it keeps on changing to complete an entire view to no view at all, as the moon takes one month to complete one rotation around the earth and depending on its position in respect to the sun, the illumination occurs resulting in gibbon, crescent, new, full, and no moon. The earth has its own path on which it revolves around the sun and the moon has its own path on which it rotates around