Because we only see the part of the Moon that is lit by the Sun
Because sometimes it is cloudy
{"name":"Space Mission", "url":"https://www.quiz-maker.com/QPREVIEW","txt":"Which satellite travels around the Earth?, How long does the Earth take to orbit the Sun, How long does the Moon take to orbit the Earth","img":"https://www.quiz-maker.com/3012/images/ogquiz.png"}