In the coming few months you are likely to hear about a 'supermoon'. Here are some facts about it. A full moon happen when the sun, Earth and moon line up, and the earth in present in the middle. From earth's surface it looks fully illuminated.
This happens because it is opposite the sun in the sky. In the east the moon shows up just like the sun sets in the west. Around 12 hours later the moon sets in the west and the sun rises in the east.