[April Holladay] Winter Solstice: Earth is tipped away from the Sun and toward the Full Moon. So, we look south to see the Sun and north at the Full Moon.

As Earth orbits the sun, it spins about a tilted axis and undergoes seasons. When the winter solstice arrives, Earth is tipped away from the Sun. So we in the Northern Hemisphere look south to see the Sun. The Sun rides low (south) in the sky.

You've got the hard part--picturing a low winter Sun. Now it's easy to see why the Full Moon is high. Remember, Earth is between the Sun and the Moon when the Moon is full. Earth is tipped away from the Sun because it's the winter solstice and towards the Moon since the Moon is on the other side of Earth.