The base class is the super/parent class of a child class; so a child class inherit from a base class.
When a child class inherit from a base class; it have access to redefine the member function that is declared public. 'public' is an access modifier which means it can be access from outside the class and modified.
Therefore, all the child class which inherit the base class can redefine the member function that are public.
Because the motion in the outer space is constant, there is also a constant value for the moon at perigee. This is the point at the orbit of the moon at which it is nearest to Earth. The other term is apogee which is the farthest point. <em>T</em><em>he perigee is equal to about 356,500 km.</em>
