Full Moon in Capricorn: The General accepting his defeat gracefully

For people who are at the very beginning of their astrological explorations, that fact that every New Moon and succeeding Full Moon take place in opposite signs is a bit puzzling. Why New Moon in Aris is followed by Full Moon in Libra? And then, why does it jump back again to New Moon in Taurus, with the lunation in Scorpio two weeks after?

What is this sorcery and who is to blame?

The Moon. The Moon is to blame ;)