
22. Third Quarter
The final principle phase of the Moon is third-quarter. Compared to the first quarter, this phase is when the opposite side of the Moon is illuminated. When you look up into the sky during the third quarter, you will see that exactly one half of the Moon’s surface is lit up.
In this phase, the Moon is roughly 270 degrees away from the Sun. During the First and Third Quarter phases, the Moon and Sun are pulling in opposite directions. This leads to a process known as a neap tide, which occurs when there is a minute difference between high and low tide.