The idea here is that there's a full moon every month, because the moon takes a month to complete one orbit around the Earth.
(the moon; takes; a month) (The idea here; is; that there's a full moon every month, because the moon takes a month to complete one orbit around the Earth)
the moon The idea here
takes is
a month
that there's a full moon every month, because the moon takes a month to complete one orbit around the Earth