i undertsand about the orbiting and the kinds of moons there are, the moon is darkened by the earth's shadow, but it seems that the only way the earth could make a shadow like that is if it were the shape of an apple bitten to the core! must sound more complex than it is, but if you understand, answer?
The earth onstructs the light coming from sun. diagram below \ ) o * / the sun (far left) sends light towards earth. earth (middle) blocks light, and the moon only gets enough for wax. gibbous shape
The earth onstructs the light coming from sun. diagram below \ ) o * / the sun (far left) sends light towards earth. earth (middle) blocks light, and the moon only gets enough for wax. gibbous shape