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An example of an aspect we all have experienced is the Full Moon, the moment when the aspect (angular separation) between the Sun and the Moon is exactly 180 degrees – with the Moon directly opposite the Sun, one on either side of the earth.

Of course, the Moon circles the earth each month, and is always making some aspect or angular relationship with the Sun as it moves from New Moon one month to the New Moon of the next month, some 29.5 days later.

Not only astrologers, but most people in the world are more-or-less aware of the ever-changing Moon in the sky each night, as it makes its monthly 360-degree circle around the earth. We can also see the Moon (sometimes) during the day, when it is not too close to the Sun. These angular separations or aspects have always fascinated astrologers.