The autumnal occurs in september when the days start getting shorter and the nights are longer in the northern hemisphere. during a new moon phase, spring tides produce the difference between high and low tides. tides are caused by pulling the water of the oceans and causing it to bulge toward the large masses of the moon and sun. during a lunar eclipse, the moon briefly passes through the where it receives much less sunlight causing the moon to appear dim. when the moon passes between the sun and the earth a/an eclipse occurs which momentarily blocks the sun's rays from reaching certain areas of the earth.