does not rotate around itself, with respect to Earth.
Suppose you tie a
foot ball to a string, revolve it in a circle and you also rotate around yourself, then you see only one side
of the foot ball. This is so because the football is not having a rotatory motion around
Earth and moon are locked gravitationally. So we always see only the same part of the moon. THis is the brighter part of moon. We do not see the darker side of moon.