Part of the year the northern half experience summer because it tilts toward the Sun while the southern half tilting away from the sun experiences winter.
(it; tilts; toward the Sun; T:while the southern half tilting away from the sun experiences winter) (the southern half; tilting; away from the sun experiences winter)
it the southern half
tilts tilting
toward the Sun T:while the southern half tilting away from the sun experiences winter
away from the sun experiences winter