The moon has two types of phases and they are waxing and waning moon. Each type has four phases that define the moon giving the moon a total of 8 different phases. Now, the moon doesn't actually disappear and reappear, but it relects the light given by the sun. Depending on the location of the moon depicts the phase of the moon. If you are curious to see what phases of the moon are coming up, click here!
Source: Youtube
