One side of the moon (the Earth facing side) becomes fully visible at Full Moon.
The gibbous phases of the Moon occur when the visible face of the Moon is more than half illuminated, but not fully illuminated.
New Moon Phase
New Moon Phase
New Moon. During this moon phase the sun is shining fully on the moon's far side and the near side remains dark. The only time it is visible from Earth is when a solar eclipse occurs.
a
new moon
New Moon
The waxing crescent is the first phase after the new moon.
Immediately before New Moon.
New Moon.
New Moon.
A waning cresent.